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:
Oct. 16, 2007
Filed:
Dec. 03, 2002
Dinesh Venkatesh, Westford, MA (US);
Xiaoye Jiang, Shrewsbury, MA (US);
Jiannan Zheng, Ashland, MA (US);
Uresh Vahalia, Newton, MA (US);
Dinesh Venkatesh, Westford, MA (US);
Xiaoye Jiang, Shrewsbury, MA (US);
Jiannan Zheng, Ashland, MA (US);
Uresh Vahalia, Newton, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
Internally, a production file system and each of its related snapshot file systems have a common file system identifier (fid') and a unique respective file system identifier (fsid′). Externally, the production file system and each of its related snapshot file systems has a common file system identifier (fsid) and a unique respective file identifier (fid). For example, the 'fsid' and 'fid' for the production and snapshot file systems are interchanged between a client-server protocol layer and a logical volume layer in a file server. Moreover, the file handle for an object indicates whether an object is in either a production file system that is not configured to have related snapshots, a production file system that is configured to have related snapshots, or a snapshot file system. When the object is in a snapshot file system, the file handle also indicates the related production file system.