Failover Configuration Overview

The Sun Cluster HA for Sun ONE Application Server is a data service with appropriate extension properties to configure a failover application server mastered by one node at a time. A domain's administrative server can also be made highly available as a failover resource. Web clients can connect directly to the Sun ONE Application Server.

Use of the Sun ONE Application Server command-line or GUI administration tool is restricted in a clustered environment. Before you configure application instances and the administrative server into resource groups, see Configuration Restrictions for information about using asadmin or the Sun ONE Application Server Administrative Interface in your cluster. See “Configuration Guidelines for Sun Cluster Data Services” in Sun Cluster 3.1 Data Service Planning and Administration Guide for more information about configuring resources and resource groups.

Use the standard configuration in this section to plan the installation and configuration of the Sun Cluster HA for Sun ONE Application Server. The Sun Cluster HA for Sun ONE Application Server might support additional configurations. However, you must contact your Enterprise Services representative for information on additional configurations.

The following figure illustrates a standard failover configuration for a Sun ONE Application Server that runs on a two-node cluster. See Configuration Restrictions for additional information about configuring Sun Cluster HA for Sun ONE Application Server as a failover data service.

Figure 1–1 Two-Node Cluster With Failover Data Service Configuration