Performance Evaluation of Disk Scheduling Schemes in a VOD System 


Vol. 7,  No. 11, pp. 3519-3533, Nov.  2000
10.3745/KIPSTE.2000.7.11.3519


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  Abstract

In a VOD(Video-On-Demand) system, I/O performance and storage requirements are generally more important than computing capability. Due to the development of CPU technology, the gap between the performance of processors and disk speed are widening. Therefore, the disk system typically becomes the bottleneck in a VOD system. In order to alleviate those effects from physical constraints, disk array system is used. The I/O performance of disk arrays can be improved by the capability of processors, I/O scheduling policy, the number of member disks in the array, disk block size, block placement method etc. In this paper, we considered the disk scheduling schemes including EDF(Earliest Deadline First), SCAN, SCAN-EDF, Round-robin, GSS(Grouped Sweeping Scheme), and C-SCAN, LOOK, C-LOOK which are variations of SCAN. Mainly focusing on those disk scheduling schemes, we performed the simulation in order to compare and review the performance of disk arrays considering several related parameters under diverse environments and analyzed the effects of those parameters to the performance.

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[IEEE Style]

Y. H. Jeon and S. H. Lee, "Performance Evaluation of Disk Scheduling Schemes in a VOD System," The Transactions of the Korea Information Processing Society (1994 ~ 2000), vol. 7, no. 11, pp. 3519-3533, 2000. DOI: 10.3745/KIPSTE.2000.7.11.3519.

[ACM Style]

Yong Hee Jeon and Sang Hag Lee. 2000. Performance Evaluation of Disk Scheduling Schemes in a VOD System. The Transactions of the Korea Information Processing Society (1994 ~ 2000), 7, 11, (2000), 3519-3533. DOI: 10.3745/KIPSTE.2000.7.11.3519.

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