Sun Java System Calendar Server 6.3 Administration Guide Multiple Front-end Servers with Multiple Back-end Servers in Calendar Server Version 6.3

Figure 5–1 shows two front-end servers and two back-end servers running a single Calendar Server instance. You can also configure more than two front-end or back-end servers, if you wish.

This configuration allows the servers to be protected by a firewall to restrict access to the LDAP and calendar databases. The calendar database is distributed across the two back-end servers.

The front-end servers are CPU intensive, with most CPU time spent rendering calendar data for end-users. The back-end servers are disk intensive, with most CPU time spent accessing the calendar database.

For configuration instructions, see 5.2 Configuring Calendar Servers for CLD and DWP.

Figure 5–1 Multiple Front-End Servers with Multiple Back-End Servers

This shows an example of a system with both multiple
back-ends and front-ends.