Optimal balancing of I/O requests to disks
- 1 September 1975
- journal article
- Published by Association for Computing Machinery (ACM) in Communications of the ACM
- Vol. 18 (9) , 524-527
- https://doi.org/10.1145/361002.361013
Abstract
Determining a policy for efficient allocation and utilization of a set of disk drives with differing operational characteristics is examined using analytical techniques. Using standard queueing theory, each disk drive is characterized by a queueing model with service time of a disk drive represented by the probability density function of the sum of two uniform distributions. Total response time of the set of disk models is then minimized under varying load conditions. The results indicate that faster devices should have higher utilization factors and that the number of different device types utilized tends to decrease with decreasing load. Specific examples using 2314 and 3330 combinations are examined.Keywords
This publication has 1 reference indexed in Scilit:
- Analysis of a Drum Input/Output Queue Under Scheduled Operation in a Paged Computer SystemJournal of the ACM, 1969