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:
Aug. 30, 2016
Filed:
Jul. 16, 2012
Ivan Basov, Brookline, MA (US);
Jean-pierre Bono, Westboro, MA (US);
Morgan Clark, South Orange, NJ (US);
Christopher H. Stacey, Chistchurch, NZ;
Ivan Basov, Brookline, MA (US);
Jean-Pierre Bono, Westboro, MA (US);
Morgan Clark, South Orange, NJ (US);
Christopher H. Stacey, Chistchurch, NZ;
EMC Corporation, Hopkinton, MA (US);
Abstract
Directory attributes are provided so that the time for creating an incremental backup of a file system by a scan of the file system tree is proportional generally to the number of files that change between backups instead of the number of files in the file system. A tree modification attribute indicates whether or not any file in a directory tree has changed since the last backup. If no file has changed in the directory tree, then the entire tree is skipped during the scan for changed files. In addition, a list is compiled of the files in the directory that represent branches having at least one changed file, so that the list is scanned instead of the directory entries. When a file is changed for the first time since the last backup, the file is queued so that the directory attributes are updated in a background process.