Database management system with a multiple-level cache...

G - Physics – 06 – F

Patent

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G06F 12/02 (2006.01) G06F 17/30 (2006.01) H04M 15/00 (2006.01)

Patent

CA 2371121

The present invention relates to a method and system for database management with a multi-level cache arrangement. There is provided a method for storing data in a multi-level cache arrangement. The method comprises the steps of initially storing all data in a secondary cache and receiving requests for data. The method moves requested data from the secondary cache to a primary cache, wherein when subsequent requests for the data are received, the primary cache is searched before the secondary cache. The method further periodically synchronizes and merges data in the primary cache back into the secondary cache to refresh the primary cache and remove stale information. The present invention also provides a data management system for storing data in a multi-level cache arrangement. The system is comprised of a unit for initially storing all data in a secondary cache and a receiver for receiving requests for data. A unit is provided in the system for moving requested data from the secondary cache to a primary cache, wherein when subsequent requests for data are received the primary cache is searched before the secondary cache. A unit is also provided for periodically synchronizing and merging all data in the primary cache back into the secondary cache to refresh the primary cache and remove stale information.

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