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. 16, 2004
Filed:
Feb. 15, 2002
Itaru Nishizawa, Koganei, JP;
Nobutoshi Sagawa, Koganei, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention improves the scalability of application servers and database servers in Web systems, thereby providing higher cost-performance Web systems. The session state of an application is stored in a clustered cache database as required. This enables another application running on an arbitrary cluster server to read the stored session state from the clustered cache database to continue the processing of the application. In addition, a cache database cluster in which data can be updated on the cluster servers is configured, thereby providing a mechanism of causing them to synchronize with the database servers as necessary. Furthermore, a mechanism of adding cache databases to the cache database cluster, thereby enabling the system to respond to an increase in database access load.