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:
Jan. 29, 2008
Filed:
Nov. 01, 2005
Tianyu Jiang, Export, PA (US);
Tianyu Jiang, Export, PA (US);
Network Appliance, Inc., Sunnyvale, CA (US);
Abstract
A mirroring application running on a primary server in a multiple destination mirroring environment is provided. The mirroring application configures a scanner with snapshots that are registered. The scanner calculates a logical age for each snapshot. The scanner scans a flexible volume once for data blocks that are newer than a predetermined snapshot. The scanner tags each such block with a logical age that is equivalent to the oldest snapshot that refers to that block. The scanner loads the tagged blocks in a queue. A sender module associated with each destination in the mirroring environment inspects blocks in the queue and retrieves only those blocks younger than a destination reference snapshot. The sender sends those blocks to the destination and filters out older blocks, thus bringing the destination mirror up to date with the current active file system.