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:
Dec. 04, 2018
Filed:
Jan. 21, 2015
Emc Ip Holding Company Llc, Hopkinton, MA (US);
Morgan A Clark, South Plainfield, NJ (US);
William C Davenport, Burlington, NJ (US);
Michael D Schouten, Lake Katrine, NY (US);
Qi Mao, Shanghai, CN;
Yingchao Zhou, Beijing, CN;
Yunfei Chen, Shanghai, CN;
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
Described are methods, systems, and apparatus, including computer program products for de-duplicating access control lists (ACLs). A first ACL associated with a first computer file is received. A first checksum based at least in part on the first ACL is calculated. One or more directory entries based on the first checksum are retrieved from a de-duplication directory, wherein each directory entry of the one or more directory entries comprises a reference to an ACL and a name comprising the first checksum. A directory entry of the one or more directory entries is identified that references a second ACL that specifies the same permissions as the first ACL. A reference to the second ACL of the directory entry is added to the first computer file.