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:
Jul. 08, 2014
Filed:
Jun. 28, 2012
Helen S. Raizen, Jamaica Plain, MA (US);
Cesareo Contreras, Northbridge, MA (US);
Michael E. Bappe, Loveland, CO (US);
Edward L. Thigpen, Raleigh, NC (US);
Helen S. Raizen, Jamaica Plain, MA (US);
Cesareo Contreras, Northbridge, MA (US);
Michael E. Bappe, Loveland, CO (US);
Edward L. Thigpen, Raleigh, NC (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
A method of performing data migration from a source storage device to a target storage device in a failover cluster includes use of a roll-forward flag to signal successful completion of a migration operation from a migration node to failover nodes of the cluster, reliably controlling host access to the target storage device to ensure that it is used only when it has been successfully synchronized to the source storage device and a commit operation has occurred that ensures that subsequent read and write operations are directed exclusively to the target storage device.