Fire drill tests the disaster-readiness of a configuration by mimicking a failover without stopping the application and disrupting user access.
The process involves creating a fire drill service group, which is similar to the original application service group. Bringing the fire drill service group online on the remote node demonstrates the ability of the application service group to fail over and come online at the site, should the need arise.
Fire drill service groups do not interact with outside clients or with other instances of resources, so they can safely come online even when the application service group is online. Conduct a fire drill only at the remote site; do not bring the fire drill service group online on the node hosting the original application.