What action can an administrator expect DRS to take during a host failure in a vSphere cluster?

During a host failure in a vSphere cluster, DRS (Distributed Resource Scheduler) operates in conjunction with HA (High Availability). When a host fails, HA initiates the recovery process for the virtual machines that were running on the affected host. Specifically, HA restarts these virtual machines on different hosts within the same cluster that have sufficient resources available.

This process involves the allocation of virtual machines to the most appropriate host within the cluster, taking into account resource availability and any defined resource pools or DRS rules. Once HA has detected the failure and restarted the VMs on available hosts, DRS can then come into play to further optimize the distribution of workloads if necessary. Therefore, the action described in the correct answer accurately reflects the typical behavior of DRS in tandem with HA during such events. The emphasis is on the recovery within the same cluster, as it is designed to work effectively in this context for rapid failover and resource management.