OPTIMAL BACKUP INTERVAL OF A DATABASE SYSTEM USING A CONTINUOUS DAMAGE MODEL

Syouji Nakamura, Toshio Nakagawa and Hitoshi Kondo
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Syouji Nakamura: Department of Human Life and Information, Kinjo Gakuin University, 1723 Omori 2-chome, Moriyama-ku, Nagoya 463-8521, Japan
Toshio Nakagawa: Department of Management and Information Systems, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota 470-0392, Japan
Hitoshi Kondo: Faculty of Economics, Nanzan University, 118 Yamazato-cho, Showa-ku, Nagoya 466-8673, Japan

Chapter 17 in Recent Advances in Stochastic Operations Research II, 2009, pp 243-251 from World Scientific Publishing Co. Pte. Ltd.

Abstract: AbstractSuppose that a database is updated and an amount of updated files accumulates additively. Some media failures occur at random. A full backup is made when the total updated files exceed a threshold level. To lessen the overhead of backup processing, the operation of an incremental backup with small overhead is adopted between the full backup. The mean time to incremental or full backup and the expected cost of these schemes are derived, using the theory of cumulative processes. Further, optimal numbers of incremental backup which minimize the expected costs are analytically discussed. A numerical example is finally given.

Keywords: Operations Research; Uncertainty; Applied Probability; Stochastic Process; Optimization; Decision Science (search for similar items in EconPapers)
Date: 2009
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