Clusterware Resource Modeling

Clusterware Resource Modeling

• When an application is registered, you define how Clusterware manages it by defining its attributes.
• The registration information includes an action script or action program that Clusterware calls to start, stop, check, and clean up the application.
• An action script is a shell script that a generic script agent provided by Oracle Clusterware calls.
• An application-specific agent is usually a C or C++ program that calls Clusterware APIs directly.
• Oracle Clusterware 11g R2 includes two agents:
• Script agent: CRS_HOME/bin/scriptagent
• Application agent: CRS_HOME/bin/appagent

Resource Types

• Oracle Clusterware uses resource types to organize resources employing similar attributes.
• Benefits from the use of resource types include:
• You need to manage only necessary resource attributes.
• You can manage all resources based on the resource type.
• All resources registered with Oracle Clusterware must be associated with a resource type.
• There are two resource types predefined in Oracle Clusterware:
• Local resource
• Cluster resource
• You can define custom resource types with Enterprise Manager.