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:
Oct. 14, 2008
Filed:
Aug. 11, 2000
George Mount, Mountain View, CA (US);
Ramachandra Srivatsa, Sunnyvale, CA (US);
George Mount, Mountain View, CA (US);
Ramachandra Srivatsa, Sunnyvale, CA (US);
America Online, Inc., Dulles, VA (US);
Abstract
The invention relates to the backup of a user session on a network. When the user at a client, such as an ISP, makes a request on the network, this request is routed by a load balancer to a primary host server on the network. The selection of the server is done by the load balancer in such a manner as to distribute the load on the system evenly and prevent overloading of one particular server. Once the user request has been routed, user specific information such as a session identification code or a password is provided to the primary host server and the session is set up. A single session must comprise of at least one application process on the selected primary host server. On commencement of the session, the load balancer designates at least one other server on the network to act as primary backup server for the user session set up on the primary host server. The primary backup server stores session information from the primary host server and in case of a server breakdown, the backup server takes over as the primary server. The load balancer then configures another server to act as backup server for this new primary server. According to the invention, the backup function of the servers is equitably distributed across servers so as to ensure that no one server is excessively burdened with the backup functions.