Resource Types

A resource type consists of a software application to be run on the cluster, control programs used as callback methods by the RGM to manage the application as a cluster resource, and a set of properties that form part of the static configuration of a cluster. The RGM uses resource type properties to manage resources of a particular type.

In addition to a software application, a resource type can represent other system resources such as network addresses.

The resource type developer specifies the properties for the resource type and sets their values in a resource type registration (RTR) file. The RTR file follows a well-defined format described in "Setting Resource and Resource Type Properties" and in the rt_reg(4) man page. See also "Defining the Resource Type Registration File" for a description of a sample resource type registration file.

Table A-1 provides a list of the resource type properties.

The cluster administrator installs and registers the resource type implementation and underlying application on a cluster. The registration procedure enters into the cluster configuration the information from the resource type registration file. The Sun Cluster 3.0 12/01 Data Services Installation and Configuration Guide describes the procedure for registering a data service.