WEBDEV Concepts

174 Part 5: Databases HFSQL Client/Server clusters HFSQL Cluster is an extension of the HFSQL Client/Server database model. In a database cluster, all HFSQL servers contain a copy of the databases and are synchronized in real time. • The read load can be balanced across multiple servers. • You can make changes to the physical configuration without interruptions on client computers. • If one of the servers crashes, the client is automatically redirected to an operating server. Web server Access to data Cluster HFSQL Client/Server server Applying modifications Session of client 1 Session of client N HFSQL Client/Server server HFSQL Client/Server server HFSQL Client/Server server