Method and system for managing multiple database storage units

Details Method and system for managing multiple database storage units Method and system for managing multiple database storage units

2008-01-22

2008-01-22

Alam, Shahid (Department: 2162)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000, C707S793000

Reexamination Certificate

active

10929699

ABSTRACT:
The system manages at least a database in multiple database storage units, and the database is duplicated for redundancy. The system maintains the database redundancy for security. The system enables the maintenance and reorganization of the database storage units without interrupting the on-going operations involving the access to the database storage units. The non-stop ongoing database access is available by allocating a pair of a main storage unit and an intermediate storage unit that maintains the substantially identical data. During certain predetermined operations, the main storage unit is being dedicating to the on-going transactions while the intermediate database storage unit is manipulated to contain data that corresponds to a specified time. For example, the content of the intermediate storage is subsequently copied or used to update another database. When the above duplication or incorporation is completed, the intermediate storage unit is updated for the transactions that have taken place during the above operations to be synchronized with the main storage unit.

REFERENCES:
patent: 5799305 (1998-08-01), Bortvedt et al.
patent: 6212529 (2001-04-01), Boothby et al.
patent: 6385604 (2002-05-01), Bakalash et al.
C.J. Date; 1990; An Introduction to Database Systems; vol. 1; Chapter 23-Chapter 24; pp. 616-641.
Bruce Lindsay; 1993; Transaction Processing: Concepts and Techniques; The Morgan Kaufmann Series in Data Mangaement Systems; pp. 644-655.
David A. Patterson, Garth Gibson and Randy H. Katz; 1988; A Case for Redundant Arrays of Inexpensive Disks (RAID); pp. 109-116.

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