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. 22, 2011
Filed:
Jan. 28, 2008
Michael F. Brown, Brighton, MA (US);
Kiran P. Madnani, Framingham, MA (US);
David W. Desroches, Methuen, MA (US);
Michael F. Brown, Brighton, MA (US);
Kiran P. Madnani, Framingham, MA (US);
David W. DesRoches, Methuen, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
A clustered storage array consists of multiple nodes coupled to one or more storage systems. The nodes provide a LUN-device for access by a client. The LUN-device maps to a source logical unit corresponding to areas of storage on the one or more storage systems. A target logical unit corresponds to different areas of storage on the one or more storage systems. The source logical unit is migrated in parallel by the multiple nodes to the target logical unit. Data to be copied from the source logical unit to the target logical unit are grouped into data chunks. Two or more of the plurality of nodes concurrently attempt to acquire an exclusive lock for a set of data chunks. The node acquiring the exclusive lock migrates the set of data chunks from the source logical unit to the target logical unit, while the exclusive lock is used to prevent other nodes from migrating the set of data chunks.