Thomas Bönisch - Böcker

InMarch2005about40scientistsfromEurope,JapanandtheUScametogether the second time to discuss ways to achieve sustained performance on superc- puters in the range of Tera?ops. The workshop held at the High Performance Computing Center Stuttgart (HLRS) was the second of this kind. The ?rst one had been held in May 2004. At both workshops hardware and software issues were presented and applications were discussed that have the potential to scale and achieve a very high level of sustained performance. The workshops are part of a collaboration formed to bring to life a concept that was developed in 2000 at HLRS and called the “Tera?op Workbench”. The purpose of the collaboration into which HLRS and NEC entered in 2004 was to turn this concept into a real tool for scientists and engineers. Two main goals were set out by both partners: • To show for a variety of applications from di?erent ?elds that a sustained level of performance in the range of several Tera?ops is possible. • To show that di?erent platforms (vector based systems, cluster systems) can be coupled to create a hybrid supercomputer system from which applications can harness an even higher level of sustained performance.

With this second issue of "High Performance Computing on Vector Systems ~ Proceedings of the High Performance Computing Center Stuttgart" we con­ tinue our publication of most recent results in high performance computing and innovative architecture. Together with our book series on "High Perfor­ mance Computing in Science and Engineering'06 - Transactions of the High Performance Computing Center Stuttgart" this book gives an overview of the most recent developments in high performance computing and its use in scientific and engineering applications. This second issue covers presentations and papers given by scientists in two workshops held at Stuttgart and Tokyo in spring and summer 2006. These workshops are held as part of a collaboration of NEC and HLRS in the "T- aflop Workbench Project" and many of the papers stem from users of the large NEC SX~8 vector systems installed at Stuttgart. At the forefront of research has been the question of how to achieve a high level of sustained performance on vector supercomputers.

InMarch2005about40scientistsfromEurope,JapanandtheUScametogether the second time to discuss ways to achieve sustained performance on superc- puters in the range of Tera?ops. The workshop held at the High Performance Computing Center Stuttgart (HLRS) was the second of this kind. The ?rst one had been held in May 2004. At both workshops hardware and software issues were presented and applications were discussed that have the potential to scale and achieve a very high level of sustained performance. The workshops are part of a collaboration formed to bring to life a concept that was developed in 2000 at HLRS and called the “Tera?op Workbench”. The purpose of the collaboration into which HLRS and NEC entered in 2004 was to turn this concept into a real tool for scientists and engineers. Two main goals were set out by both partners: • To show for a variety of applications from di?erent ?elds that a sustained level of performance in the range of several Tera?ops is possible. • To show that di?erent platforms (vector based systems, cluster systems) can be coupled to create a hybrid supercomputer system from which applications can harness an even higher level of sustained performance.