Article ID: | iaor20052403 |
Country: | France |
Volume: | 36 |
Issue: | 3 |
Start Page Number: | 227 |
End Page Number: | 235 |
Publication Date: | Jul 2002 |
Journal: | RAIRO Operations Research |
Authors: | Nakagawa Toshio, Qian Cunhua, Pan Yu |
This paper considers two backup schemes for a database system: a database is updated at a nonhomogeneous Poisson process and an amount of updated files accumulates additively. To ensure the safety of data, full backups are performed at time NT or when the total updated files have exceeded a threshold level K, and between them, cumulative backups as one of incremental backups are made at periodic times i