Configure SAP DB so that SAP DB starts only on a node where SAP xserver is running. To implement this configuration, configure resources and resource groups as follows:
Ensure that the resource for SAP DB depends on the resource for SAP xserver.
Create on the SAP DB resource group a strong positive affinity for the SAP xserver resource group.
For more information, see Registering and Configuring Sun Cluster HA for SAP DB.