시뮬레이션 기법을 이용한 완전 비동기 디스크 어레이 성능 평가

A Perlormance Evaluation of a Fully Asynchronous Disk Array Using Simulation Method

As real-time processing of data with large storage space is required in the era of multimedia, disk arrays are generally used as storage subsystems which be able to provide improved I/O performance. To design the cost-effective disk my, it is important to develop performance models which evaluate the disk array performance. Both queueing theory and simulation e applicable as the method of performance evaluation through queueing modeling. But there is a limit to the analytical method using queueing theory due to the characteristics of disk array requests being serviced in the parallel and conerrent manner. So in this paper we evaluate the disk my performance using simulation method which abstract disk array systems in the low level. Performance results were evaluated through simulation, so that mean response time, mean queueing delay, mean service time, mean queue length for disk array requests and utilization, throughput for disk array systems, can be utilized for capacity planning in the phase of disk array design.