Disaster recovery system suitable for database system

Details Disaster recovery system suitable for database system Disaster recovery system suitable for database system

2011-04-12

2011-04-12

LeRoux, Etienne P (Department: 2161)

Data processing: database and file management or data structures

File or database maintenance

Database recovery

Reexamination Certificate

active

07925633

ABSTRACT:
To reduce operational and management costs during normal operations while recovering a database without loss and maintaining on-line performance on a site. A first system includes a primary storage system (103) that stores a DB (107) and a main computer (100) that executes a primary DBMS (101), which provides a DB. A second system includes a secondary (113) that receives from the primary storage system (103) a copy of a log, which shows update differences of the DB (107), and stores a secondary DBMS (117), and a subset (500) that recovers the secondary DB (117) according to the log that is copied from the primary storage system (103). When a failure occurs in the first system, the first system is switched to the second system. A second computer (110) that executes a second DBMS (111) is added to the second system, and the secondary DB (117) that is recovered or is being recovered in the subset (500) is taken over to the second computer (110).

REFERENCES:
patent: 5640561 (1997-06-01), Satoh et al.
patent: 6226651 (2001-05-01), Masuda et al.
patent: 2001/0344141 (2001-10-01), Suto
patent: 09-062555 (1997-03-01), None
patent: 2001-344141 (2001-12-01), None
Oracle Technology Network, “Oracle Database 10g Oracle Data Guard,” Web:http://otn.oracle.com/deploy/availability/htdocs/DataGuardOverview.html; Apr. 6, 2004, pp. 1-7.

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