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:
Oct. 12, 2010
Filed:
Apr. 05, 2005
Vishal Kathuria, Woodinville, WA (US);
Michael J Zwilling, Redmond, WA (US);
Hanumantha R Kodavalla, Sammamish, WA (US);
Steven R Schmidt, Redmond, WA (US);
Martin J Sleeman, Redmond, WA (US);
Rajeev B Rajan, Kirkland, WA (US);
Artem a Oks, Bellevue, WA (US);
Vishal Kathuria, Woodinville, WA (US);
Michael J Zwilling, Redmond, WA (US);
Hanumantha R Kodavalla, Sammamish, WA (US);
Steven R Schmidt, Redmond, WA (US);
Martin J Sleeman, Redmond, WA (US);
Rajeev B Rajan, Kirkland, WA (US);
Artem A Oks, Bellevue, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
Systems and methods are disclosed that facilitate providing page-level database restore functionality upon detection of a corruption event. Updates to a data page in a database can trigger generation of a snapshot of the data page, and an update log can be maintained that stores information related to page updates. Subsequent snapshots can be generated at predetermined intervals and can trigger truncation of a log segment and initiation of a new log segment. Upon detection of page corruption, a most-recent uncorrupt snapshot of the corrupt page can be identified, copied to the location of the corrupt page in the database, and modified according to the log segment associated with the uncorrupt snapshot to make the page current as of the corrupting event, all of which can be performed to restore the database without having to take the database offline.