a supercomputer is a device for turning a CPU-bound problem into an IO-bound problem Heh. I remember a tale from the days of the early generation Crays, where

a supercomputer is a device for turning a CPU-bound problem into an IO-bound problem Heh. I remember a tale from the days of the early generation Crays, where they were showing one off to an IBM guy, who said, yeah, impressive, but what about I/O? So a Cray guy ran something and got all the tapes to moving. The IBM guy was unimpressed until they pointed out they were writing data to all of them. At least in those days the problem was understood, don't know about current supercomputers, but as I understand it one of the things that makes them expensive is their board to board interconnects, so I doubt they neglect I/O at the same time.