Prediction of Disk Arm Movements in Anticipation of Future Requests

Authors:
Enzo Mumolo
Affiliations:
-
Venue:
MASCOTS '99 Proceedings of the 7th International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems
Year:
1999

Citing 0
Cited 2

Reducing disk I/O times using anticipatory movements of the disk head

Journal of Systems Architecture: the EUROMICRO Journal
RG-EDF: An I/O Scheduling Policy for Flash Equipped Sensor Devices

SEUS '08 Proceedings of the 6th IFIP WG 10.2 international workshop on Software Technologies for Embedded and Ubiquitous Systems

Quantified Score

Hi-index	0.00

Visualization

Abstract

Algorithms for performing predictive movements of the disk arm in anticipation of future requests, aimed at reducing the disk access time, are described in this paper. The prediction is based on the past history of the requested disk tracks . A continuum of optimization algorithms have been derived, featuring different prediction performance and, hence, different complexities. Trace driven simulations have shown that relative seek time reduction from about 11% to 23% for a workstation workload can be obtained using anticipatory movements.