Steps to configure dependencies between resource groups

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This section provides a high-level outline of the steps required to configure a dependency between resource groups.

These steps include:

  1. For each application that is going to be included in dependent resource groups, configure application controllers and application monitors.
  2. Create resource groups and include application controllers as resources. For instructions, see Configuring resource groups and Adding resources and attributes to resource groups using the extended path.
  3. Specify a dependency between resource groups. For instructions, see Configuring resource groups with dependencies.
  4. Use the SMIT Verify and Synchronize Cluster Configuration option to guarantee the desired configuration is feasible given the dependencies specified, and ensure that all nodes in the cluster have the same view of the configuration.

To ensure that the applications in the dependent resource groups start successfully, you should configure multiple application monitors.

In general, we recommend that you configure the following monitors:
  • A monitor that will check the running process for an application in the child resource group, and a monitor that will check the running process for an application in the parent resource group.
  • A monitor that will check the running process for an application in the source resource group in a startafter dependency, and a monitor that will check the running process for an application in the target resource group in a startafter dependency.

For a parent resource group, it is also advisable to configure a monitor in a startup monitoring mode to watch the application startup. This ensures that after the parent resource group is acquired, the child resource group(s) also can be acquired successfully. Similarly, for a target resource group in a startafter dependency, it also is advisable to configure a monitor in a startup monitoring mode to watch the application startup. This ensures that after the target resource group is acquired, the source resource group(s) also can be acquired successfully.

For information on monitor modes that you can specify (long-running mode, startup monitoring mode, and both), see Monitor modes.

For instructions on configuring application monitoring, see Configuring multiple application monitors.