CLUSTERED APPLICATION SERVER AND WEB SYSTEM HAVING DATABASE STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a Web system with high cost performance by enhancing the scalability of the application server and data base server of the Web system. SOLUTION: A session state of application is stored in a cache database clustered if necessary. Processing of the application is continuously executed on a different cluster sever by reading the session state from the cache database. In addition, the Web system is provided with a function to create a cache database cluster which can be updated on the cluster server and to synchronize it with the database server if necessary. Furthermore, the Web system is provided with a function of adding the cache database to the cache database cluster and makes it possible to deal with addition of the cluster server to the system even when the load of the database access increases.