Sun Cluster System Administration Guide for Solaris OS

Configuring Application Resource Groups

To be highly available, an application must be managed as a resource in an application resource group. An application resource group can be configured for a failover application or a scalable application.

Application resources and application resource groups configured on the primary cluster must also be configured on the secondary cluster. Also, the data accessed by the application resource must be replicated to the secondary cluster.

This section provides guidelines for configuring the following application resource groups:

Configuring Resource Groups for a Failover Application

In a failover application, an application runs on one node at a time. If that node fails, the application fails over to another node in the same cluster. A resource group for a failover application must have the following characteristics:

Figure 4–6 illustrates the configuration of an application resource group and a replication resource group in a failover application.

Figure 4–6 Configuration of Resource Groups in a Failover Application

Figure illustrates the configuration of an application resource group and a replication resource group in a failover application.

Configuring Resource Groups for a Scalable Application

In a scalable application, an application runs on several nodes to create a single, logical service. If a node that is running a scalable application fails, failover does not occur. The application continues to run on the other nodes.

When a scalable application is managed as a resource in an application resource group, it is not necessary to collocate the application resource group with the device group. Therefore, it is not necessary to create an HAStoragePlus resource for the application resource group.

A resource group for a scalable application must have the following characteristics:

Figure 4–7 illustrates the configuration of resource groups in a scalable application.

Figure 4–7 Configuration of Resource Groups in a Scalable Application

Figure illustrates the configuration of a resource groups in a scalable application.