Method and apparatus for copying data that resides in a...

Details Method and apparatus for copying data that resides in a... Method and apparatus for copying data that resides in a...

2007-04-03

2007-04-03

Jung, David (Department: 2134)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000, C707S793000, C707S793000, C707S793000

Reissue Patent

active

10021783

ABSTRACT:
A consistent set of data is supplied to a software application from databases. When a particular set of data is identified, a first process is requested to obtain a snapshot time from a database server associated with the first database. The snapshot time causes all subsequent reads of the first database by the first process to return data that reflects a database state associated with the snapshot time. A first set of data in the first database is locked in order to produce a copy of data from a first database. After locking the first set of data, a plurality of processes are requested to obtain snapshot times from a database server associated with the first database. The snapshot time caused all subsequent reads of the first database by the plurality of processes to return data from the first database as of the snapshot times.

REFERENCES:
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patent: 5560005 (1996-09-01), Hoover et al.
patent: 5724575 (1998-03-01), Hoover et al.
http://www.sciinc.com/techinfo/versioninfo/index.htm.
http://www.databasejournal.com/features/mssql/article.php/3560451.
http://msdn2.microsoft.com/en-usllibrary/ms173763.aspx.
http://publib.boulder.ibm.com/infocenter/db2help/index.jsp?topic=/com.ibm.db2.udb.pd.doc/pd/c0020777.htm.
Rdb/VMS, A Comprehensive Guide by Lilian Hobbs and Ken England, Copyright © 1991 by digital Equipment Corporation (12 pgs).
BountyQuest Corp., “Database Guru Submits “Snapshot,” Wins Silver Bullet,” 2000, http://www.bountyquest.com/winner/winner4.htm, printed Sep. 20, 2001, pp. 1-2.

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