Supercomputing at KFA Jülich

At KFA - and in particular enforced by ZAM - supercomputing and parallel processing for computational science based on supercomputer systems, techniques, and algorithms have received high priority since many years. Besides IBM mainframes of latest provenience, at present two supercomputers CRAY X-MP and CRAY Y-MP are installed where the Y-MP is completely dedicated to HLRZ projects in elementary particle physics, solid-state and statistical physics, chemistry and other fields.Primarily, the CRAY supercomputer power has been exploited in the past in the single-processor mode by applying vectorization and optimization techniques to numerical kernels and large applications. However, on the multiprocessor vector-supercomputers CRAY X-MP and Y-MP, parallelism - beyond vectorization - is exploited by multitasking in order to achieve gigaflops performance as has been shown by the two recently gained Gigaflops Awards