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. 27, 2010
Filed:
Dec. 09, 2004
Applicants:
Tianyu Jiang, Export, PA (US);
Narayana R. Tummala, Gibsonia, PA (US);
Inventors:
Tianyu Jiang, Export, PA (US);
Narayana R. Tummala, Gibsonia, PA (US);
Assignee:
NetApp, Inc., Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 12/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A system and method manages data versions in a file system. A data version field associated with a direct block pointer in each level 1 indirect block stores a data version associated with the data contained in the direct block. When data is modified subsequent to the creation of a persistent consistency point image, the data version is incremented to a next data version value to signify that the data has been modified. Replication is aided by the ease of identifying modified data blocks by examining the data version field associated with each block.