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:
Mar. 03, 2009
Filed:
Nov. 01, 2004
Kevin J. Cherkauer, Portland, OR (US);
Scott D. Lashley, Portland, OR (US);
Steven R. Pearson, Portland, OR (US);
Effi Ofer, Thornhill, CA;
Xun Xue, Markham, CA;
Roger L. Q. Zheng, Richmond Hill, CA;
Kevin J. Cherkauer, Portland, OR (US);
Scott D. Lashley, Portland, OR (US);
Steven R. Pearson, Portland, OR (US);
Effi Ofer, Thornhill, CA;
Xun Xue, Markham, CA;
Roger L. Q. Zheng, Richmond Hill, CA;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and system are provided for providing a consistent reintegration of a failed primary instance as a new secondary instance with implementation of truncation of log records. Upon failure of a primary instance, a secondary instance may be reassigned as the new primary instance. Prior to reintegration, any portion of the database log of the failed primary that is after the log position of the new primary instance may be truncated, followed by a comparison of the log positions of both the new primary instance and the new secondary instance. In limited circumstances, the truncation of the log data generated by the failed primary instance after the point of failure is possible, and supports reintegration of the failed primary as a new secondary instance with limited overhead.