| US 7,593,974 B2 | ||
| Method and database system for duplicating transactions between remote sites | ||
| Yoshio Suzuki, Kokubunji (Japan); Shinji Fujiwara, Sagamihara (Japan); and Tsunehiko Baba, Kokubunji (Japan) | ||
| Assigned to Hitachi, Ltd, Tokyo (Japan) | ||
| Filed on Dec. 29, 2006, as Appl. No. 11/647,201. | ||
| Application 11/647201 is a continuation of application No. 10/637556, filed on Aug. 11, 2003, granted, now 7,181,479. | ||
| Claims priority of application No. 2003-087773 (JP), filed on Mar. 27, 2003. | ||
| Prior Publication US 2007/0226276 A1, Sep. 27, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G06F 17/30 (2006.01) | ||
| U.S. Cl. 707—204 [707/200; 707/201; 707/202] | 9 Claims |
| 1. A data management system for managing a database system including a first information processing system that includes a
computing device and a storage, a second information processing system that includes a computing device and a storage, and
a communication network connecting the first information processing system with the second information processing system,
said data management system being installed in the first information processing system or the second information processing
system, and said data management system comprising:
means for determining, when executing a query, whether the query has been copied to said second information processing system;
means for executing the query if the query has been copied; and
means for simultaneously copying queries remaining uncopied among accepted queries to said second information processing system
if the query has not been copied and if the query is a commit to permanently save results of the executed transaction including
the commit query to said storage.
|