U.S. Army’s 1,566 64-bit Apple Xserve G5 supercluster can exceed 25 teraflops
Wednesday, September 15, 2004 - 12:43 PM ESTWhen the Hypersonic Missile Technology (HMT) team at COLSA Corporation and the U.S. Army need to model hypersonic flight on a computer system, they'll no longer have to wait two months to get results. The HMT team, headed by senior scientist Dr. John Medeiros, now has access to one of the world's largest and most powerful computers: a supercluster of 1,566 64-bit, dual-processor Apple Xserve G5 servers.
Called MACH5 - an acronym for Multiple Advanced Computers for Hypersonics - the Apple cluster "gives us more than 60 times the computational power of our current production machine," says Medeiros. What used to take two months can now be done in a day. "A single person using a hand-held calculator - without pausing to eat or sleep - would need more than two million years to calculate what the Apple supercluster can calculate in a single second."
"Once you have that kind of computational power," Medeiros adds, "you can look at things with higher resolution and see other problems you want to investigate. Plus you can tackle much larger problems."
Medeiros and the COLSA team chose the Xserve-based supercluster to model the complex aero-thermodynamics of hypersonic flight for the Research, Development and Engineering Command (RDECOM) of the U.S. Army at nearby Redstone Arsenal. Working with the COLSA team, Drs. Billy Walker and Kevin Kennedy of RDECOM conduct leading-edge analysis of hypersonic flight for a number of important military programs.
At its peak, the supercluster can exceed 25 teraflops - calculating more than 25 trillion floating-point operations per second. By comparison, the world’s fastest computer - NEC’s $350 million Earth Simulator - runs at a peak speed of 40 teraflops.
Medeiros uses a 17-inch PowerBook and colleagues use both Macs and PCs to access the cluster. After downloading a CFD data file the cluster has generated, COLSA and RDECOM scientists use visualization software to examine streamlines, temperatures and pressures around the model or object.
"I still use both Macs and PCs, but I prefer the PowerBook," Medeiros says. "It's easier to use and I can actually get work done without fussing or having to figure out how the bits and pieces work together."
"The wonderful thing about Mac OS X besides its great capabilities and attractive desktop is the fact that the terminal is UNIX at heart," Medeiros adds. "That’s the interface a lot of scientists and engineers cut their teeth on, and it gives them the most control over the system. That’s a tremendous advantage."
Much more, including pictures and specs here.


Can this supercomputer send email?