Title :
An Analytic Response Time Model For Single-and Dual-Density Disk Systems
Author :
Franklin, Mark A. ; Sen, Amitava
Author_Institution :
Department of Electrical Engineering, Washington University
Abstract :
The question of replacing a single-density, two-channel, two-controller disk system with a cheaper, plug-compatible, dual-density, single-channel system having the same capacity is considered. An analytical model is explored to examine the effect of such a replacement on average response time, that is, the time between issuing an I/O request and completion of the request. Queueing theory is used to obtain curves of response time versus arrival rate, and the results are compared with corresponding curves obtained by a simulation model.
Keywords :
Disk arm contention, equipment replacement, M G 1 queues, queueing models, response times, single-and dual-density disks.; Analytical models; Application software; Arm; Computational modeling; Costs; Delay; Disk drives; Hardware; Queueing analysis; System performance; Disk arm contention, equipment replacement, M G 1 queues, queueing models, response times, single-and dual-density disks.;
Journal_Title :
Computers, IEEE Transactions on
DOI :
10.1109/T-C.1974.223846
