SIMSCRIPT Solutions


SIMSCRIPT II.5: COMPUTER ARCHITECTURE and NETWORK ANALYSIS


Disk Subsystem Simulation

Hughes Aircraft Company; Englewood, CO

The Disk Subsystem Simulation model is a fairly detailed model of the hardware, software, and job-load environment of a multiprocessor mainframe system. With it, Hughes wants to answer questions such as how to distribute files (roughly) across the disk subsystem in order to minimize I/O contention, would adding more disks and/or controllers ease contention and by how much, what is the effect on jobs in the system of locking certain jobs in memory and so on.

Benefits of SIMSCRIPT II.5: Hughes was able to increase throughput, shorten delays, decrease contention, and balance the resource mix better.