When configuring failover groups, the Sun Ray data store is automatically configured to enable replication of the Sun Ray administration data across the primary and secondary Sun Ray servers. In large failover groups, significant loads may be pushed onto the primary server from various sources. In addition, runaway processes from user applications on the primary can degrade the health of the entire failover group.

Failover groups of more than four servers should have a dedicated primary server solely devoted to serve the Sun Ray data store. For example, a dedicated primary server should not host any Sun Ray sessions. To configure the primary server so that it serves only the Sun Ray data store, use the utadm -f command to take the server offline. Secondary servers should always serve user sessions and the data store.