DRS & HA
Distributed Resource Scheduler and High Availability.
Distributed Resource Scheduler (DRS)
DRS balances computing workloads with available resources in a virtualized environment. It manages clusters of hosts as a single compute resource.
[Diagram: DRS Load Balancing]
High Availability (HA)
VMware HA provides easy-to-use, cost-effective high availability for applications running in virtual machines. In the event of physical server failure, affected VMs are automatically restarted on other production servers with spare capacity.