Improving disk performance via latency reduction
- 1 January 1991
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Computers
- Vol. 40 (1) , 22-30
- https://doi.org/10.1109/12.67317
Abstract
It is shown that in many environments the rotational latency and the rotational position sensing (RPS) miss delay are the major contributors to a disk's basic service time. A sensitivity study using a simple analytical queueing model shows that a reduction in these two components (both of which are related to the rotation of disk drives) has the greatest impact in reducing the disk's basic service time and in turn produces the greatest improvement in overall subsystem performance. While the most straightforward way to reduce latency and RPS miss penalty would be to increase the disk's rotation speed, there are some limitations to such an approach. Several alternatives to reducing latency and RPS miss penalty are proposed and explored, and their performance is analyzed using analytical queuing models.<>Keywords
This publication has 13 references indexed in Scilit:
- Trade-offs between devices and paths in achieving disk interleavingPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Winchester disks reach for a gigabyte: Poised for a 200-fold increase in capacity over initial models of six years ago, 5 1/4-inch hard disks are emerging as major elements for small-system designsIEEE Spectrum, 1987
- A Quarter Century of Disk File InnovationIBM Journal of Research and Development, 1981
- Solid State Memory Development in IBMIBM Journal of Research and Development, 1981
- The Evolution of Magnetic StorageIBM Journal of Research and Development, 1981
- A General Model for the Performance of Disk SystemsJournal of the ACM, 1977
- An anomaly in disk schedulingCommunications of the ACM, 1976
- Queueing Analysis of the Scan Policy for Moving-Head DisksJournal of the ACM, 1975
- A comparative analysis of disk scheduling policiesCommunications of the ACM, 1972
- Effects of scheduling on file memory operationsPublished by Association for Computing Machinery (ACM) ,1967