vSphere Distributed Resource Scheduler (DRS) requirements

Before using vSphere DRS, the following requirements must be met:

• vCenter Server needs to be installed.
• CPUs in ESXi hosts must be compatible.
• to use DRS for load balancing, hosts in the DRS cluster must be part of a vMotion migration network.
• all hosts should use shared storage, with volumes accessible by all hosts.
• shared storage needs to be large enough to store all virtual disks for the VM.
• DRS works best if the VMs meet vSphere vMotion requirements, listed here.