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:
Feb. 09, 2016
Filed:
Jun. 28, 2013
Emc Corporation, Hopkinton, MA (US);
Jean-Pierre Bono, Westborough, MA (US);
William C. Davenport, Burlington, MA (US);
Miles A. de Forest, Bahama, NC (US);
Walter C. Forrester, Berkeley Heights, NJ (US);
Michal Marko, Fanwood, NJ (US);
Ye Zhang, Shanghai, CN;
Philippe Armangau, Acton, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
A data storage system includes storage devices and a processing subsystem executing software forming a lower-deck file system and an upper-deck file system. The lower-deck file system presents a volume file from which storage is provided to the upper-deck file system, and units of storage of the storage devices are allocable to the upper-deck file system but not reserved to it. The volume file is thinly provisioned, and additional units of storage are added dynamically to increase its allocated size in response to demand from the upper-deck file system. The lower-deck file system operates in a mapped mode in which a block address in the lower-deck file system is obtained by a generally arbitrary mapping (e.g., an Inode/IB tree) of a block address in the volume file.