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:
May. 06, 2003
Filed:
Dec. 10, 1999
James Allan Scott, Brighton, MA (US);
Jeffrey J. Vroom, Jamaica Plain, MA (US);
Art Technology Group, Inc., Cambridge, MA (US);
Abstract
A computer system for a web site uses load balancing of new sessions based on measurements and estimates of past, present, and future performance, using the average time each application server takes to respond to a request (the latency) and the number of active sessions on each application server. Generally, once assigned to a session, an application server handles all future requests relating to that session. However, if the load or performance of an application server becomes sufficiently degraded, a failover mechanism causes future requests to be handled by a different application server until the performance improves. Under extreme circumstances, an application server will be restarted. If a web or HTTP server is unable to have requests served by any application server, future requests may be redirected to another web server.