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:
Nov. 03, 1998
Filed:
Jun. 26, 1996
Scott Norin, Newcastle, WA (US);
Darren Arthur Shakib, Redmond, WA (US);
Max Loell Benson, Redmond, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
Systems and methods for discovery based data recovery in a store and forward replication system are presented. Data loss is discovered by comparing a list of changes made to a local copy of a replica object with a list of changes received over the network from other nodes also having a copy of the replica object. When the list of changes received contains changes that the local list does not, the local system knows its copy of the replica object is not up-to-date. Missing changes are then requested from other systems having the missing data. In making the request, care is taken to minimize the cost incurred in recovering the missing data and to balance network traffic among several other nodes, if possible.