Utility Sacrificed for Speed, Supercomputer Critics Say

摘要

Japan's K computer made headlines in June 2011 as the world's fastest supercomputer and again last November when it became the first computer to top 10 petaflops-or 10 quadrillion calculations per second-solving a benchmark mathematical problem. But by the time it opened for general use last week, it had lost those bragging rights. In June, the IBM Sequoia supercomputer built for the National Nuclear Security Administration at Lawrence Liver-more National Laboratory in Livermore, California, became number one, notching a top speed of 16.32 petaflops.