The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 2005
Filed:
Oct. 01, 2002
Alan J. Demers, Boulder Creek, CA (US);
James William Stamos, Saratoga, CA (US);
Lewis S. Kaplan, Los Angeles, CA (US);
Nimar Arora, Union City, CA (US);
Alan J. Demers, Boulder Creek, CA (US);
James William Stamos, Saratoga, CA (US);
Lewis S. Kaplan, Los Angeles, CA (US);
Nimar Arora, Union City, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
A method for applying changes to a standby system is described in which multiple apply tasks or 'slaves' are scheduled to changes from redo logs, especially those changes in large transactions, in parallel and as soon as they are encountered in the logs. To foster data convergence, a partial ordering may be imposed on the transactions so that those transactions that actually depend on others are forced to wait on the transactions they are dependent upon commit. To foster read consistency, synchronization points may be periodically established, at which points a read consistent state of the standby database system can be obtained-all without adversely impact the throughput of the system.