Planning for PowerHA policies

PowerHA policies are designed to modify the behavior of the High Availability (HA) environment

In an environment running IBM® PowerHA® SystemMirror® for i, PowerHA policies establish actions and capabilities that PowerHA uses when processing instructions. These policies provide a single point of control for the administration of changes to operations. Each policy has a name with additional information that identifies the individual policy, including the domain, such as the name of an administrative domain, or a cluster resource group (CRG) that the policy controls. Policies contain qualifiers that identify the individual instance of that policy and extend or limit the scope of the policy's management functions.

There are different types of PowerHA policies based on the behaviors modified. These are:
  • administrative domain policies control and modify the configuration parameters associated with the operating environment.
  • CRG policies configure the resources used to manage the high availability environment.
  • communication policies control the parameters that configure the communication connections between the systems in the cluster environment.
Regardless of the policy type, all PowerHA policies require some common information, including:
  • the name of the policy.
  • a domain name, specifying the domain to which the policy applies. For example, for an administrative domain policy, the policy domain is the name of the administrative domain; for a CRG policy, the policy domain is the name of the CRG.
Policies can require additional values do differentiate it from other policies in the domain or to supply information unique to the individual policy. For more information about setting up or using HA policies visit the Adding HA policies and Managing HA policies pages of the Knowledge Center.