/ Backup/recovery Apparatus and method for non-log processing of real-time main memory database system

摘要

The present invention relates to a backup / recovery device that does not perform log processing in a main memory resident database system, and a method thereof, wherein a page is updated in a shadow area of the main memory instead of performing log processing for the main memory resident database system. The backup / recovery device that improves the performance of the whole system by directly copying and modifying the modified pages, and performing a one-step backup of the modified pages to the stable memory device, and finally performing a two-step backup from the stable memory device to the backup disk. To provide a method, a first step of performing a first backup of the pages changed by the current transaction in the shadow area to the backup buffer of the stable memory in accordance with the result of the transaction in the main memory; A second step of performing a second backup from a backup buffer to a backup disk through the stable memory device; And a third step of loading and restoring a page in a backup list to the main memory resident database when a system error occurs, and is used in a main memory resident database system.