O subsistema de memória de massa do multiprocessador multiplus

Abstract

This paper presents the architecture of the I/O subsystem for mass storage which has been proposed for MULTIPLUS, a high performance scientific multiprocessor under development at NCE/UFRJ. After studying the I/O bottleneck problem, which results from an existing gap in the technological evolution of processor and mass storage devices, and identifying the parameters which define the I/O subsystem performance, the paper discusses the advantages and drawbacks of the use of a concentrated or distributed I/O subsystem architecture. Finally, a distributed architecture, which is suitable for scientific parallel application, is proposed for the MULTIPLUS I/O subsystem and the internal organization of the I/O processosr is presented and justified through numerical analysis.