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:
Jul. 19, 2011
Filed:
Oct. 25, 2004
Applicants:
Himanshu Aggarwal, Cary, NC (US);
Andy C. Kahn, San Francisco, CA (US);
Eric C. Hamilton, Durham, NC (US);
Inventors:
Himanshu Aggarwal, Cary, NC (US);
Andy C. Kahn, San Francisco, CA (US);
Eric C. Hamilton, Durham, NC (US);
Assignee:
Network Appliance, Inc., Sunnyvale, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 17/30 (2006.01); G06F 12/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A storage system, such as a file server, creates persistent consistency point images (PCPI) or 'snapshots' that are point-in-time representations of the storage system. The storage system uses persistent consistency point images to backup or mirror data. Using data already found in the data block maps associated with these PCPI, the rate of change of data between persistent consistency point images can be determined.