4.3 Defining Resources
The HACMP for AIX software provides a highly available environment by identifying a set of
•Disks
•Volume groups
•File systems
•Network addresses
•Application servers
In the HACMP for AIX software, you define each resource as part of a resource group. This allows you to combine related resources into a single logical entity for easier configuration and management. You then configure each resource group to have a particular kind of relationship with a set of nodes. Depending on this relationship, resources can be defined as one of three types: cascading, concurrent access, or rotating. See 2.4.1, “Resource Group Options” on page 28 for details.
After configuring the cluster topology, you must configure resources and set up the cluster node. This involves:
•Configuring resource groups and node relationships to behave as desired
•Adding individual resources to each resource group
•Setting up
•Synchronizing cluster nodes
4.3.1Configuring Resource Groups
Resource Groups are initialized by telling the HACMP ODM their names, the participating nodes, and their relationship. The order in which the participating nodes are defined is taken as the priority of the resource chain, that is, priority is decreasing from left to right.
The relationship can be one of Cascading, Rotating or Concurrent. See 2.4.1, “Resource Group Options” on page 28 for details.
