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. 15, 2011
Filed:
May. 23, 2006
Craig K. Harmer, San Francisco, CA (US);
John A. Colgrove, Los Altos, CA (US);
Peter Vajgel, Menlo Park, CA (US);
Milind Borate, Pune, IN;
Bhimsen Bhanjois, Santa Clara, CA (US);
Craig K. Harmer, San Francisco, CA (US);
John A. Colgrove, Los Altos, CA (US);
Peter Vajgel, Menlo Park, CA (US);
Milind Borate, Pune, IN;
Bhimsen Bhanjois, Santa Clara, CA (US);
Symantec Operating Corporation, Mountain View, CA (US);
Abstract
A method and mechanism for managing a time-indexed block map in a file system configured to store multiple versions of file data. A file system includes inodes or other structures corresponding to files in the system. Responsive to creating a file, one or more blocks are allocated for use in storing the file data. A block map is maintained for the file and is updated to include an identification of the blocks storing the file data and a timestamp corresponding to the stored data. In response to creating a file, data corresponding block map is maintained. In addition, a new entry is created in the block map which identifies the newly allocated blocks. Further, an entry of the block map is updated to (i) identify the particular blocks to which the write was directed and (ii) include a timestamp corresponding to the time of the write.