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:
Apr. 14, 2009
Filed:
Jun. 01, 2004
Applicant:
Bruce W. Leverett, Pittsburgh, PA (US);
Inventor:
Bruce W. Leverett, Pittsburgh, PA (US);
Assignee:
Network Appliance, Inc., Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 17/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
A system and method for replaying a log file without performing a total cache flush. The log replay is performed in three phases, a pre-processing phase that determines which portions of the log file are to be replayed, a redo phase where certain transactions are redone and an undo phase where certain transactions are rolled back. After performing the log replay only the data dirtied during the undo phase is flushed from the cache, thereby decreasing the amount of time required for the log replay operation.