User guide

Basic System Configuration
1-9
2. When Setting Up the Authentication Server on Multiple Machines and the Repository Server
on a Machine (Middle-scale System: Balancing the Authentication Server Load)
This configuration is suitable when the number of users of the business system and the volume of
simultaneous access to that business system is large.
This system configuration places a load balancer before multiple authentication servers to balance the
load of the authentication servers. Three or more authentication servers can be implemented.
Figure 1-6 Setting Up the Authentication Server on Multiple Machines and the Repository Server
on a Machine (Middle Scale System- Balancing the Authentication Server Load)
3. When Setting Up the Authentication Server and the Repository Server on Multiple Machines
Individually (Large-scale System)
This system configuration has multiple repository servers that are used separately as update and
reference systems. Multiple repository servers have been used in this setup in order to share and
balance the processing load as needed.
This system configuration positions a load balancer between the client and multiple authentication
servers, to balance the load of the authentication servers. This configuration also uses multiple
repository servers to balance the load on repository servers during authentication processing.
Multiple repository servers (reference systems) can be allocated for an authentication server. With
multiple repository servers, even if a repository server (reference system) stops (fails), the system can
continue operation by switching the repository server to another (reference system). A repository server
(update system) can be also operated as a repository server (reference system). If a repository server
(update system) stops (fails), the system is automatically stopped.
The information stored in the SSO repositories of update and reference systems must always be
maintained to be the same status by the repository replication function.
Two or more repository servers (reference systems) can be installed.