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:
Mar. 10, 2015
Filed:
Sep. 26, 2012
Emc Corporation, Hopkinton, MA (US);
John A. Hilliar, Norwood, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
Storing and retrieving user data files includes, in a file storing operation, applying a first mapping (e.g. hash function) to a file identifier to originate a content address in a flat content address space; applying a second mapping (e.g., grouping of digits/characters) to the content address to originate a multi-level directory name usable in a file system; invoking the file system to store the user data file in the named directory. A file retrieving operation includes applying the first mapping to the file identifier to regenerate the content address; applying the second mapping to the regenerated content address to regenerate the directory name; invoking the file system using the regenerated directory name to retrieve the user data file. The method enables a general-purpose network attached storage (NAS) system to store files organized according to a legacy content-addressed storage (CAS) model of existing applications.