language: en

[This research is partially supported by DARPA grant N00014-94-1-0845, DARPA contract F19628--95-C-0193, NSF grant CCR-9224375, and grants from Hewlett-Packard, Intel and Tektronix.]

Predictable File Access Latency for Multimedia

D. Revel, C. Cowan, D. McNamee, C. Pu, and J. Walpole
Department of Computer Science and Engineering Oregon Graduate Institute of Science & Technology
20000 N.W. Walker Rd., P.O. Box 91000 Portland, OR 97291-1000

[(503) 690-1121]

{revel,crispin,dylan,calton,walpole}@cse.ogi.edu

Abstract Multimedia applications are sensitive to I/O latency and jitter when accessing data in secondary storage. Transparent adaptive prefetching (TAP) uses software feedback to provide multimedia applications with file system quality of service (QoS) guarantees. We are investigating how QoS requirements can be communicated and how they can be met by adaptive resource management. A preliminary test of adaptive prefetching is presented.

Keywords QoS, adaptive, multimedia, prefetching

1 INTRODUCTION