Êtes-vous un étudiant de l'EPFL à la recherche d'un projet de semestre?
Travaillez avec nous sur des projets en science des données et en visualisation, et déployez votre projet sous forme d'application sur GraphSearch.
Concept
Kendall Square Research
Résumé
Kendall Square Research (KSR) was a supercomputer company headquartered originally in Kendall Square in Cambridge, Massachusetts in 1986, near Massachusetts Institute of Technology (MIT). It was co-founded by Steven Frank and Henry Burkhardt III, who had formerly helped found Data General and Encore Computer and was one of the original team that designed the PDP-8. KSR produced two models of supercomputer, the KSR1 and KSR2. It went bankrupt in 1994.
The KSR systems ran a specially customized version of the OSF/1 operating system, a Unix variant, with programs compiled by a KSR-specific port of the Green Hills Software C and FORTRAN compilers. The architecture was shared memory implemented as a cache-only memory architecture or "COMA". Being all cache, memory dynamically migrated and replicated in a coherent manner based on the access pattern of individual processors. The processors were arranged in a hierarchy of rings, and the operating system mediated process migration and device access. Instruction decode was hardwired, and pipelining was used. Each KSR1 processor was a custom 64-bit reduced instruction set computing (RISC) CPU clocked at 20 MHz and capable of a peak output of 20 million instructions per second (MIPS) and 40 million floating-point operations per second (MFLOPS). Up to 1088 of these processors could be arranged in a single system, with a minimum of eight. The KSR2 doubled the clock rate to 40 MHz and supported over 5000 processors. The KSR-1 chipset was fabricated by Sharp Corporation while the KSR-2 chipset was built by Hewlett-Packard.
Besides the traditional scientific applications, KSR with Oracle Corporation, addressed the massively parallel database market for commercial applications. The KSR-1 and -2 supported Micro Focus COBOL and C/C++ programming languages, and the Oracle database and the MATISSE OODBMS from ADB, Inc. Their own product, the KSR Query Decomposer, complemented the functions of the Oracle product for SQL uses. The TUXEDO transaction monitor for OLTP was also provided.
Source officielle
À propos de ce résultat
Cette page est générée automatiquement et peut contenir des informations qui ne sont pas correctes, complètes, à jour ou pertinentes par rapport à votre recherche. Il en va de même pour toutes les autres pages de ce site. Veillez à vérifier les informations auprès des sources officielles de l'EPFL.