I've just finished building a (really small) 4-node cluster for some research I'm doing.
Each node is a Duron 750 w/256MB RAM and a 100Base net card, power supply and floppy drive. They're vertically stacked on some 2' threaded rod from McMaster Carr.
But get this: I built the whole thing for $170 per node. That's everything, shipped to my door.
They load the kernel off the floppy and grab the NFS root from a fileserver I've got set up, so no need for hard drives. Granted, there's a bit more network and memory overhead (both/var and/tmp sit in memory), but I can buy more nodes from the money that I've saved on hard drives.
Re:PDA PHONE THAT DOESN'T LOOK LIKE A GEEK ALERT
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The Evolution Of PDAs
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These can be had for around $15 each if you know where to get 'em...and I'm still on my first set of pads after four months of usage.
The game itself is quite a workout...especially after a few hours of play on the harder levels.
That is, assuming you can handle the fact that all your friends will be laughing at you the first time they see the game. At least until they play it. Most people get hooked at that point.
3.5" drive which has a platter radius of about 1.5"...minus an 0.5" spindle gives us a size of 6.28"^2 per platter. At 4 platters per drive (it's normally 4, right?) and two sides per platter (right?) that's 50.24"^2.
Now, assuming we can safely put 135Gb/in^2 (90% of the superparamagnetic limit), we're looking at 6782.40 Gb/disc==847GB.
Assuming I can stash three or four hard drives per commodity PC box, that looks like 3.4TB of pr0n^H^H^H^HMP3s.
And that sounds like a lot. But then again, where would I put the 150 circa 1996 500MB drives that I would need to hold my 75GB of crap, eh?
I work for a fairly small computing firm which relies mainly on AIX but also has a fair number of Linux boxen around.
In the past few months, the question has come up more than once as to whether AIX or Linux is a more appropriate solution to whatever problem my company is current facing...and often times we've installed Linux on commodity hardware instead of buying a fancy RS/6000 machine and buying another copy of AIX.
My question is that as Linux grows in stability and wider corporate-level acceptance, what's IBM going to do about it? IBM has invested a good deal in the AIX system and I'm sure that they generate a fairly hefty revenue stream from it. Do you forsee any of the IBM Linux initiatives losing funding if they encroach on AIX market share?
I've got pretty much the same thing (ableit sans all the neato variables...but it's got most of the options) on my Palm. It's called Planetarium and can be found here.
Really great for romantic evenings with other geeks!
And the speed of sound varies inversely proportionally to the compressability of the medium, which in turn varies inversely proportionally to the density and pressure. So you got that right; the speed of sound is proportional to the density of the medium.
But the last part of your argument is backwards; at higher altitudes, the density of air decreases and so does the speed of sound.
I also remember reading somewhere that the speed of sound at 30,000 feet is close to 630mph.
But the article gets it right...Mach 7 at several thousand feet is quite close to 5000mph.
Although technically, Mach 5 == 5000mph for compressed (>1atm) air, but you'll be hard pressed (no pun intended) to find enough of that to fly a plane in.
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Pics of the $170/node cluster threaded together.
... whatever is on the Durons. Sorry I don't know off the top of my head.
FSB is 133, if I'm not mistaken. Cache is
Forget the eMachines.
/var and /tmp sit in memory), but I can buy more nodes from the money that I've saved on hard drives.
I've just finished building a (really small) 4-node cluster for some research I'm doing.
Each node is a Duron 750 w/256MB RAM and a 100Base net card, power supply and floppy drive. They're vertically stacked on some 2' threaded rod from McMaster Carr.
But get this: I built the whole thing for $170 per node . That's everything, shipped to my door.
They load the kernel off the floppy and grab the NFS root from a fileserver I've got set up, so no need for hard drives. Granted, there's a bit more network and memory overhead (both
*cough*
http://images.google.com/images?q=Nokia+9000i
*cough*
Personally, I'll stick with my Dance Dance Revolution pads.
These can be had for around $15 each if you know where to get 'em...and I'm still on my first set of pads after four months of usage.
The game itself is quite a workout...especially after a few hours of play on the harder levels.
That is, assuming you can handle the fact that all your friends will be laughing at you the first time they see the game. At least until they play it. Most people get hooked at that point.
150Gb/in^2 seems like a lot...but let's see here.
3.5" drive which has a platter radius of about 1.5"...minus an 0.5" spindle gives us a size of 6.28"^2 per platter. At 4 platters per drive (it's normally 4, right?) and two sides per platter (right?) that's 50.24"^2.
Now, assuming we can safely put 135Gb/in^2 (90% of the superparamagnetic limit), we're looking at 6782.40 Gb/disc==847GB.
Assuming I can stash three or four hard drives per commodity PC box, that looks like 3.4TB of pr0n^H^H^H^HMP3s.
And that sounds like a lot. But then again, where would I put the 150 circa 1996 500MB drives that I would need to hold my 75GB of crap, eh?
I work for a fairly small computing firm which relies mainly on AIX but also has a fair number of Linux boxen around.
In the past few months, the question has come up more than once as to whether AIX or Linux is a more appropriate solution to whatever problem my company is current facing...and often times we've installed Linux on commodity hardware instead of buying a fancy RS/6000 machine and buying another copy of AIX.
My question is that as Linux grows in stability and wider corporate-level acceptance, what's IBM going to do about it? IBM has invested a good deal in the AIX system and I'm sure that they generate a fairly hefty revenue stream from it. Do you forsee any of the IBM Linux initiatives losing funding if they encroach on AIX market share?
I've got pretty much the same thing (ableit sans all the neato variables...but it's got most of the options) on my Palm. It's called Planetarium and can be found here.
Really great for romantic evenings with other geeks!
Mach 1 is fairly close to 714mph at sea level.
And the speed of sound varies inversely proportionally to the compressability of the medium, which in turn varies inversely proportionally to the density and pressure. So you got that right; the speed of sound is proportional to the density of the medium.
But the last part of your argument is backwards; at higher altitudes, the density of air decreases and so does the speed of sound.
I also remember reading somewhere that the speed of sound at 30,000 feet is close to 630mph.
Whoa there, cowboy.
Mach 5 is roughly 3800mph at sea level.
But the article gets it right...Mach 7 at several thousand feet is quite close to 5000mph.
Although technically, Mach 5 == 5000mph for compressed (>1atm) air, but you'll be hard pressed (no pun intended) to find enough of that to fly a plane in.