| 摘要 |
A set of servers takes advantage of the existing data redundancy of a mirrored database to restore page corruptions. The page restore may occur with none of the time and/or administration costs of a restore from backup media and without the data loss associated with repair. Online page restore from a database mirror can be initiated and performed by the computer system automatically upon corruption detection. An entire file or database instead of an individual page or set(s) of pages can be restored. The mechanism can be used both to restore corrupt pages on the principal server from a mirror, or corrupt pages on a mirror from the principal server. Online page restore from a database mirror enables page data recovery without the need to find/load/scan through and apply data and log backups, allowing efficient and potentially automatic data recovery.
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