Once enabled, power management (vSphere DPM) will analyze the cumulative resource requirements (current usage and reservations), verify the HA requirements, and determine the number of hosts required to meet them. From then on, DPM will selectively put ESXi host/hosts into standby mode. Prior to putting an ESXi into standby mode, DPM will leverage DRS's ability to
distribute the VMs running on the selected ESXi host to the other ESXi hosts in the cluster.

DPM can operate in three modes:

• Off: In this mode, DPM is Disabled
• Manual: In this mode, the DPM recommendations are displayed for the administrator to choose and confirm
• Automatic: In this mode, the DPM recommendations are automatically executed

The DPM threshold, much like DRS's migration threshold, will display/apply recommendations based on the priority assigned to the recommendation.