Online performance evaluation of RAID 5 using CPU utilization
Hai Jin, Hua Yang, Jiangling Zhang · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1998
ABSTRACT Redundant Arrays of Independent Disks (RAID) technology is the efficient way to solve the bottleneck problem betweenCPU processing ability and I/O subsystem. For the system point of view, the most important metric of on line performance isthe utilization of CPU. This paper first employs the way to calculate the CPU utilization of system connected with RAID level5 using statistic average method. From the simulation results of CPU utilization of system connected with RAID level 5 subsystem can we see that using multiple disks as an array to access data in parallel is the efficient way to enhance the on-lineperformance of disk storage system. Using high-end disk drivers to compose the disk array is the key the enhance the on-lineperformance of system.Keywords: Performance Evaluation, CPU Utilization, Disk Array, Simulation, Statistic Average Method 1. 1TTRODUCTIONOver the past decade, it has been recognized that as CPU and memory performance of computers continues todramatically increase, I/O performance is improved at a much slower pace. To address the growing gap between