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:
Dec. 14, 2010
Filed:
Dec. 29, 2006
Barbara Liskov, Waltham, MA (US);
Barbara Liskov, Waltham, MA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A network of nodes caches replicated datasets in which dataset changes are efficiently propagated as a set of changes even under failure conditions. A master node and a plurality of subordinate nodes in the network each maintain a copy of the dataset and a change log storing change events in the dataset in that node. The change log further includes a rename chain having a plurality of linked rename records created in response to a new master gaining control of the dataset. The master node computes and propagates dataset changes to the subordinate nodes as a set of change events. If the master node fails, one of the subordinate nodes becomes temporary master and continues to propagate dataset changes using its dataset and its change log in response to update requests from other nodes where the update request contains information from the change log of the requestor node.