Lim Hyoung Roung, Kim Jong Hoon, Kim Young Ju, Chung Ki Dong

The Transactions of the Korea Information Processing Society (1994 ~ 2000), Vol. 4, No. 12, pp. 2971-2984, Dec. 1997
10.3745/KIPSTE.1997.4.12.2971,   PDF Download:

Abstract

In this paper, we propose an efficient video block placement scheme that utilize the current disk product that has MZR disk characteristic and users' skewed access pattern on VOD. Also, we evaluate its performance through simulation and modeling of VOD server. The basic placement rule is to place on MZR disks by LP, SHP methods according to the Zipf distribution of popularity. To verify the proposed scheme, we examined its performance on workstation with 2 MZR disks under varied skewed factors. The proposed placement scheme showed better response time than the random method. To extend proposed placement scheme to disk group, we analyzed the theoretical maximum numbers of concurrent users and the require buffer size per user. For performance parameters for the proposed scheme, we considered the disk head scheduling methods, the placement methods and the striping unit. The result of experiments showed that the proposed scheme was effective.

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