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:
Nov. 17, 2009
Filed:
Jul. 29, 2002
Michael E. Root, San Jose, CA (US);
Anand A. Kekre, Baner, IN;
Arun M. Rokade, Dombivli, IN;
John A. Colgrove, Los Altos, CA (US);
Ronald S. Karr, Palo Alto, CA (US);
Oleg Kiselev, Palo Alto, CA (US);
Michael E. Root, San Jose, CA (US);
Anand A. Kekre, Baner, IN;
Arun M. Rokade, Dombivli, IN;
John A. Colgrove, Los Altos, CA (US);
Ronald S. Karr, Palo Alto, CA (US);
Oleg Kiselev, Palo Alto, CA (US);
Symantec Operating Company, Cupertino, CA (US);
Abstract
A method, system, computer system and computer program product to synchronize data and a snapshot of the data taken at a given point in time. Persistent data change maps are used to track changes made to data after a snapshot of the data is taken. Changes to the data are tracked using a persistent accumulator map, and changes to the data with respect to a second set of data are tracked using a persistent volume map. The persistent accumulator map is updated with each update of the data. Persistent volume maps are updated when a subsequent snapshot of the data is taken. Only changes to the data made after the snapshot was taken are applied to synchronize the snapshot with the data so that all of the data is not copied. Snapshots can be located in a physically separate location from the data itself.