Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
2007-02-20
2007-02-20
Gaffin, Jeffrey (Department: 2161)
Data processing: database and file management or data structures
Database design
Data structure types
C707S793000, C707S793000, C707S793000
Reexamination Certificate
active
10637556
ABSTRACT:
A method for duplicating transactions in a disaster recover system is disclosed. In this method, transactions and queries input to a primary database system are copied to a secondary database system and both database systems execute the queries and save the results permanently to each database, thereby maintaining duplicated data. When executing a query on the primary database system, if the query is a commit, the primary system simultaneously copies uncopied queries placed in a queue to the secondary database system and then executes the query. By using this processing procedure, the invention realizes a disaster recovery system which carries out copying transactions from one site to another site without losing the transactions, while reducing the influence of copy operation on the transaction processing performance.
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Baba Tsunehiko
Fujiwara Shinji
Suzuki Yoshio
A. Marquez, Esq. Juan Carlos
Fisher Esq. Stanley P.
Gaffin Jeffrey
Nguyen Cam-Linh
Reed Smith LLP
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