Title :
Hit ratio of caching disk buffers
Author_Institution :
Inst. for Inf. Storage Technol., Santa Clara Univ., CA, USA
Abstract :
Hit ratio is the primary measure of disk cache buffer efficiency, and may be contrasted against cache overhead. A technique to calculate the lower bound of hit ratio based on cache overhead is presented. A method to calculate average hit ratio based on I/O tracing is also developed. Finally, an example is cited showing that a hit ratio as low as 14% will offer a performance improvement over similar disk drives equipped with noncaching buffers.<>
Keywords :
buffer storage; magnetic disc storage; performance evaluation; average hit ratio; buffer efficiency; caching disk buffers; disk drives; performance; solid state disks; Buffer storage; Decoding; Delay; Disk drives; Disk recording; Legged locomotion; Magnetic heads; Optical buffering; Random access memory; Read-write memory;
Conference_Titel :
Compcon Spring '92. Thirty-Seventh IEEE Computer Society International Conference, Digest of Papers.
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-8186-2655-0
DOI :
10.1109/CMPCON.1992.186750
