CRS Manages Resources.
A Resource is nothing but an Application.
The Application could be a Database Instance , ASM Instances,Listeners,VIPs,services,ONS,GSD.
Life Cycle of a Resource :
* crs_profile creates and edit a resource profile.
* crs_register adds the resource to the list of applications managed by CRS.
* crs_start starts the resource according to its profile. After a resource is started, its
application process is continuously monitored by CRS using a check action at regular
intervals. Also, when the application goes offline unexpectedly, it is restarted and/or failed
over to another node according to its resource profile.
* crs_stat informs you about the current status of a list of resources.
* crs_relocate moves the resource to another node of the cluster.
* crs_unregister removes the resource from the monitoring scope of CRS.