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:
Jun. 02, 2009
Filed:
Mar. 26, 2002
Clark Lubbers, Colorado Springs, CO (US);
Susan Elkington, Colorado Springs, CO (US);
Randy Hess, Colorado Springs, CO (US);
Stephen J. Sicola, Palmer Lake, CO (US);
James Mccarty, Colorado Springs, CO (US);
Anuja Korgaonkar, Colorado Springs, CO (US);
Jason Leveille, Colorado Springs, CO (US);
Clark Lubbers, Colorado Springs, CO (US);
Susan Elkington, Colorado Springs, CO (US);
Randy Hess, Colorado Springs, CO (US);
Stephen J. Sicola, Palmer Lake, CO (US);
James McCarty, Colorado Springs, CO (US);
Anuja Korgaonkar, Colorado Springs, CO (US);
Jason Leveille, Colorado Springs, CO (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A system in which data operations for a data replication group are received in-order, and buffered. When the operations are complete, they are stored in a non-volatile memory atomically with a group sequence number. The cache is preferably mirrored. This creates a persistent association between the data operation and the sequence number. After the atomic store is performed in at least one non-volatile cache, the data operation is propagated to another member of the data replication group along with the group sequence number. In the other member, the data operation is cached at least once in a non-volatile cache atomically with the group sequence number. In this manner, the set of group sequence numbers for a plurality of operations forms a continuous ordering of the data operations.