Configuring high availability for a database or an application requires several infrastructure and configuration settings on multiple systems. However, cluster environments are subject to change after the initial setup. Administrators add disks, create new diskgroups and volumes, add new cluster nodes, or new NICs to upgrade and maintain the infrastructure. Keeping the cluster configuration updated with the changing infrastructure is critical.

HA fire drills detect discrepancies between the VCS configuration and the underlying infrastructure on a node; discrepancies that might prevent a service group from going online on a specific node.

See the Veritas Cluster Server Bundled Agents Reference Guide for information on which agents support HA fire drills.