Supercomputer To Use Optical Router 174
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.'"
*Yawn* (Score:2, Interesting)
NUMA? (Score:1, Funny)
NUMA [numa.net] must be -really- branching out.
Re:*Yawn* (Score:5, Informative)
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.
Re:*Yawn* (Score:1)
Shocking. (Score:4, Informative)
More importantly they are actualy using an optical router to prevent what has become a botleneck in resent years. I.e. Data comming off a fiber pipe is converted to electrical signals before being routed to it's next destination where it's converted back to little bity laser beams.
This should be faster than your typical loadsharing super computer (SETI@home) but slower than the miranet using hardcore. With enogh nodes however there is no telling howfast this baby can get.
Re:Shocking. (Score:3, Insightful)
Light through vacuum is quick, light through glass isn't as quick. Couple this with the inability for the light to travel in a straight line through the fibre (it bounces around off the sides -- more or less). Electrical signals through copper don't experience these affects as much.
Lastly, a rather complex and heavily delayed circuit has to convert the electrical signals to light, and back again. This takes time -- but the percentage of time taken is small in comparison to normal travelling distances but don't expect them to make a slowed down PCI bus using fibre any time soon.
sorry, but the computers do the work (Score:5, Insightful)
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.)
oh right like (Score:2)
You mean like Microsoft?
Or most ISPs?
Re:sorry, but the computers do the work (Score:5, Insightful)
No, Actually that is Dilbert...
Re:sorry, but the computers do the work (Score:2)
Don't forget marketing; I've seen marketing trump legal.
Re:sorry, but the computers do the work (Score:2)
>legal.
ROTFL, does this outfit have an entry on fuckedcompany yet?
Way of the future (Score:5, Insightful)
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.
Re:Way of the future (Score:2)
* Yes, I know Cat 5 can be a right pain in the arse, but it's a lot more robust than (current) fiber.
Re:Way of the future (Score:3, Informative)
Obviously you've never worked with fiber. Yes, the big fat cables that go underground are very rugged, and can only be bent to about a 2' radius because of all the reinforcement inside. However, the thin rubber patch cords that you use indoors are very flexible - you could coil it tightly around your finger without damaging the glass inside. The bare glass is even more flexible - you can bend it down to about a
Re:Way of the future (Score:1)
Re:Way of the future (Score:2, Informative)
Re:Way of the future (Score:3, Informative)
There are several killer apps for this kind of technology: one is setting up dedicated channels between a server and a client, EG so that you can download a 2GB movie in a couple of seconds. Another is dynamic allocation of channels on the backbone - eg if an ISP gets slashdotted, additional fiber channels could be brought up to the backbone provider or other peers. Finally, you can use it to switch a particular circuit over to an alternate route when a backhoe cuts the fiber, without having to have all the fiber terminated at routers on each end - just move the physical link in between.
Re:Way of the future (Score:4, Informative)
Apparently, this company's optical switch doesn't take tens of milliseconds. They claim it can switch in tens of nanoseconds. They call it an "optical phased array" -- no moving parts. They talk about it a bit on their web site.
Re:Way of the future (Score:2)
In other news, computers are expected to continue to be purchased by corporations. Also, breaking news just announced, the obvious will happen and be modded as Insightful.
Ok, this guy is off his rocker. (Score:1)
Umm yeah... If you didn't add in the computers what good would the optical network be?
I think this is a great example of what the old saying "think before you speak" is meant to help one avoid.
Re:Ok, this guy is off his rocker. (Score:1, Offtopic)
nytimes.com (Score:1)
Do they track IP's so could we make a universal slashdot login?
Re:nytimes.com (Score:1, Offtopic)
Re:nytimes.com (Score:1)
There is now (Score:4, Informative)
Username : SDUser
Password : slashdot
enjoy everybody
click here [nytimes.com] to login.
Re:There is now (Score:1)
what the hell is your problem? they're not asking for money. they give us a high traffic, quality content site and all they ask for in return is a free registration! or is that still too much to ask? running a site, especially a high traffic site, isn't free you know...
Now we just need.. (Score:4, Funny)
>:D
What? It could happen...
Re:Now we just need.. (Score:2, Insightful)
As a paper I once read.. I think it was called "The Fibersphere".
Switching is simply a hack to get around a lack of bandwidth.
The concept is that if we have this large, broadcast fiber network, and tunable receivers sensitive enough, everyone could transmit and receive on the same thing, and talk to anyone else. Tuning in to the right signal is all that would be required... just like RF in the atmosphere.. but with much, much higher bandwidth.
Problem? WE don't have tunable laser emitters yet.
Re:Now we just need.. (Score:2, Insightful)
I think the bigger problem it that it's difficult and expensive to build electronics to demodulate extremely high frequency signals, so you'd only rather have a few of those expensive boxes feed a bunch of cheap boxes instead of having to give everyone the expensive box.
Fabret-perot inferometer.... (Score:2)
An FP inferometer consits of a pait of parallel mirrors, one half silver, the other full. The beam of light enters at an angle, and then the position of the output from the half silvered mirror is wavelength dependant. They are used in situations similar to a diffraction grating, but they can be made much more accuratly. (There are other criteria too, which I forget.)
This seperates very close fequencies. Imagine - instead of giving a machine an IP, give it a frequency.
Haveing a laser that is tunable in frequency is not too difficult - the simplest solution would be to use an Optical parametric oscilator. These split the laser into two different colours, and you just block the colour you don't want.
Re:Well, shit! (Score:2)
Let's just set up a bunch of those dealies in a giant array which has all the functions of the world's fastest punchcard-based computer!
IN SOVIET RUSSIA (Score:1, Funny)
Re:IN SOVIET RUSSIA (Score:1)
Not to be confused with... (Score:5, Informative)
Also, their statement on the Chiaro Networks "OptIPuter" is here [calit2.net]. Caltech is an entirely different animal.
Re:Not to be confused with... (Score:1)
Re:Not to be confused with... (Score:3, Funny)
the Comittee for the Liberation and Integration of Terrifying Organisms and their Rehabilitation Into Society.
Re:Not to be confused with... (Score:1)
has to be said.... (Score:5, Funny)
Got all excited over nothing (Score:5, Insightful)
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.
Optical Switching? (Score:3, Funny)
In other breaking news electromagnetic radiation (read: electricty) doesn't travel at the speed of light! Coming Soon to Fox: When Reporters Get Confused
At any rate that article was darn short on details, and the company's website wasn't any better. Anybody have any relevant data on exactly how fast this switching system is? I'm curious about their optical router at the heart of the system as well. It is my understanding that the slowest part of any fiber-based system is the router since the signals must be converted from light to electrical than back to light signals again. One would assume that such a design would be entirely too slow to be used as a bus. Of course, I may be entirely wrong...
No you're confused (Score:2, Informative)
Re:No you're confused (Score:2, Informative)
Re:No you're confused (Score:1)
Re:No you're confused (Score:1)
I understand the physics, just trying to be funny.
Re:No you're confused (Score:1)
Re:No you're confused (Score:2)
Re:Optical Switching? (Score:3, Informative)
Ciao
Re:Optical Switching? (Score:3, Informative)
In even more breaking news, Slashdot posters stick their feet in their mouths up to the knee.
Electromagnetic radiation isn't electricity, it is light (and associated photons at wavelengths outside the visible portion of the spectrum).
Re:Optical Switching? (Score:2, Informative)
I'd like to see a... (Score:1, Funny)
Oh, nevermind.
Hooray (Score:5, Informative)
Not a supercomputer (Score:4, Insightful)
Optical routing (Score:5, Informative)
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.
Re:Optical routing (Score:1)
"The optiputer will initially consist of about 500 processors linked via the optical switching system that will permit parts of the computer to share information at the speed of light."
Precisely how will the processors connect to the optical lines? Will there be some optical transceiver connected to the front side bus? Do the processor pins wire directly into the transceiver?
Anyone know this part of the setup???
Re:Optical routing (Score:1)
Re:Optical routing (Score:1)
-brandon
Re:Optical routing (Score:1)
Re:Optical routing (Score:5, Insightful)
(a switch switches circuits or light channels in this case and a router routes packets).
I read trough their website (www.chiaro.com) but wasn't clear on how they can identify the destination addresses of the packets (essential for routing) without some sort of photonic-electrical conversion. Then it won't be an all optical router, would it?
cheers,
Frank
Re:Optical routing (Score:2)
If we assume router means IP, and switch means Ethernet, than the difference between a router and a switch is very small nowadays...
The major difference is that a router typically re-addresses the source and destination of the lower layer protocol before forwarding to the appropriate port, while a switch will just forward to the appropriate port without changing anything. Both make a forwarding decision, however, based on the destination address (MAC or IP).
As to how either of these would practically work in this technology, I have no idea
Re:Optical routing (Score:2)
You make it sound like such tiny mirrors would not work... In fact, the DLP projector in my living room has around 800,000 mirrors in it, all on a DMD chip. Sure, bending the optics as Chiaro does is cool, but I don't think it is necessarily any faster or more reliable than mirror based optical switching/routing.
Chiaro is no stranger to super-computing (Score:5, Informative)
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.
Steve Wallach (Score:4, Interesting)
He still drives a Porche with Convex as number plate.
Speaking of Supercomputers, IBM is building HAL (Score:4, Funny)
HAL will be born a few years late...
Re:Speaking of Supercomputers, IBM is building HAL (Score:2, Funny)
Before or after the six pack?
Before. (Score:2)
Re:Speaking of Supercomputers, IBM is building HAL (Score:4, Insightful)
I don't know how he calculates that. Maybe that matches the raw number of logic operations of a human brain, but a digital computer has a completely different organization, so it's like comparing apples and elephants.
The brain's advantage comes through the fact that the "logic" is embedded within and mixed up with an incredibly powerful fully associative storage system. The keys and values aren't little byte strings or numbers like digital computers use, but instead they are high-level concepts and experiences. We don't even know how to begin designing a direct emulation of this kind of hardware.
OTOH, it might take someone 10 minutes to manually do a long division problem that the computer can solve in under 1 nanosecond. However, even with all of the awesome math throughput provided by supercomputers that consume tens of kilowatts of power, nobody's come up with a system that has the real-world common sense and precise realtime control capablities of a 1 milliwatt cockroach brain. (Did you know that they can fly? I discovered that one day by spraying one on the ceiling. Scared the living shit out of me.)
Obviously, making speed comparisons between brains and digital computers is utterly meaningless when the fundamental operations they perform are so completely different.
Re:Speaking of Supercomputers, IBM is building HAL (Score:2)
OK, when you've developed your working cockroach prototype that finds food, seeks out mates, evades danger, flies, crawls in any orientation with a nice fluid motion, lays eggs, liberally dispenses brown turd stains, and generally gets around without looking like its lost, with a 100% uptime over the several months of a cockroach life, all without any help whatsoever from any source, post a story here on /.
Talking about how easy it would be to program doesn't count. Like I said, if it were easy (or even possible with today's technology), someone would have done it by now.
Optical Router, Supercomputers... (Score:4, Funny)
Doesn't SGI uses something similar? (Score:3, Interesting)
Re:Doesn't SGI uses something similar? (Score:2)
Optical fibre point-to-point has been around for years, it's often used to connect storage arrays to hosts. What the article is about is being able to switch and route optical data streams, which is an order or magnitude more complex. You see, it's easy to store an electronic signal in an electronic form, so a conventional router can stop a packet, look into it to work out what to do with it, then send it to the right place (or regenerate it on the right port). If you want to do that with light, you have to convert it into an electronic form, process it, then reconstruct the optical signal. An all-optical switch does away with the conversions. I'm not even sure if an all-optical (i.e. no electronics at all) router is even possible.
For those who don't want to use NYTIMES... (Score:1)
Is it really faster? (Score:3, Interesting)
Re:Is it really faster? (Score:3, Informative)
So, let's say that the difference in propagation speed between copper and fiber is 15%, which is probably pretty high. That would mean a difference of only about 8 nanoseconds.
How much of a difference is that? Considering that the latency of the networking layers is generally measured in milliseconds, or if you're *really* fast, microseconds, that means that the extra latency from the fiber would be anywhere from 3 to 6 orders of magnitude LOWER than that of the networking layers. That's pretty insignificant.
Now if you're talking about running a 1,000 mile interconnect, then the differences become pronounced - but trying to get any decent bandwidth out of copper at that distance is going to be impossible. Ten gigabits over long-haul fiber is commonplace. Currently, the 10 gigabit ethernet over copper attempts have been limitted to a few *feet*.
steve
Forced to go optical (Score:5, Funny)
More optical computing to come?? (Score:2, Insightful)
ahhh, the sweet sweet speed of fiber (Score:1)
Mods (Score:1)
Also... (Score:1)
Not quite an optical router (Score:5, Informative)
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.
Not as impressive as it sounds (Score:2, Interesting)
Re:Not as impressive as it sounds (Score:1, Troll)
Smarr (Score:2)
Re:How times change... (Score:1)
After a short while when we can compress these analog signals without performance gain, we'll switch.
Re:How times change... (Score:5, Interesting)
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
Re:How times change... (Score:2)
Not any old number
Re:How times change... (Score:2)
Re:How times change... (Score:3, Interesting)
Second: If you spread your devices over campus, you will not generally get "insane speeds". No signal can be sent faster than lightspeed. So if we are accessing a piece of information 1 km away, latency will be over 6.6 microsec...
Now, you can get a fast link in the sense of sending a lot of information per second, but this is not usually what you really need in a supercomputer.
Re:How times change... (Score:1)
Faster than light is possible, still experimental (Score:1)
And btw, 6.6 microseconds aint bad. I never read below, but I can imagine the massive amount of (bad) Beowulf jokes. I doubt their latency is any better. Assuming only 1 packet is sent at a time, thats ~150,000 packets per second (theorectical peak of course). Seeing as how I havent sent that many in the last 9 hours this isnt too bad of a problem. You are right that this isnt entirely whats needed for this purpose, but you cant learn if you dont try.
Re:Faster than light is possible, still experiment (Score:4, Informative)
The waveform appears to exit the apparatus before it enters, but this is not so under scrutiny... as the article says, the beginning of the wave enters the glass (long before the peak) and there is enough information there to re-create the original wave.
There are several phenomenon that appear at first to be superluminal, but they do not violate relativity, and are not actually moving anything faster than light, nor are they transmitting information.
Re:Faster than light is possible, still experiment (Score:2)
Re:How times change... (Score:3, Informative)
Re:How times change... (Score:1, Insightful)
Re:How times change... (Score:2, Funny)
yikes... (Score:4, Funny)
>"the communications lines will be the fastest part of the computer and the processors will become slower "peripherals."
Just imagine....
Tanenbaum (Score:3, Interesting)
The internet in itself might become a resource for idle CPUs. With a few billion or more individual systems networked up, playing that game of Quake 10 might rely on the processor time borrowed from others.
Re:Tanenbaum (Score:3, Interesting)
I find where bandwidth has been increasing to where it is not the major practical limit to my computing.
More and more, I find that latency is what limits my experience, be it on the network, to a disk array, or to the main memory from the CPU.
You've missed the point (Score:3, Funny)
Maybe I'm reading this wrong?
Re:haha great (Score:3, Informative)
RTFA... " Each of the clusters is based on Intel microprocessors and runs the Linux operating system."
I'm not seeing how it's all that revolutionary. Am I wrong in saying it's essentially a Beowulf connected by an optic network?
Re:Did anyone else read the headline as: (Score:2, Funny)