Configure dynamic power management

UIS Manager does not support dynamic power management (DPM) if HCI deployment is performed in system initialization.

 

DPM enables the system to automatically shut down or wake up hosts based on the monitoring policies. When the load of the cluster decreases, the system automatically shuts down the hosts with low resource usage after migrating all VMs on the hosts to other hosts in the cluster. When the load of the cluster increases, the system wakes up the shutdown hosts and distributes load to the hosts through DRS.

You can configure host reclaim conditions and host wakeup conditions. When the conditions are met, the system automatically shuts down or wakes up hosts. The host reclaim conditions or host wakeup conditions include CPU usage and memory usage. You can configure the system to perform DPM when the CPU usage or memory usage exceeds the set threshold or both of the conditions exceed their thresholds.

• Host reclaim—When the CPU usage and memory usage of a host remain lower than the threshold specified in the reclaim policy for the specified time period, the system automatically shuts down the host after migrating all VMs on the host to other hosts in the cluster. The system stops shutting down hosts when the cluster has only two or less hosts that are operating correctly.

• Host wakeup—When the CPU usage and memory usage of normal hosts remain higher than the thresholds specified in the wakeup policy for the specified time period, the system automatically wakes up hosts in shutdown state and migrates some VMs on the overloaded host to the hosts that have been woken up.

Restrictions and guidelines

• To enable DPM, make sure all hosts and VMs in the cluster use the same shared storage and the VMs are enabled with automatic migration.

• As a best practice, leave an appropriate gap between the thresholds specified in the wakeup and reclaim policies. For example, you can specify the condition CPU/memory usage < 10% in the reclaim policy, and specify the condition CPU/memory usage > 80% in the wakeup policy.

• DPM requires a host to support remote wakeup. If the host does not support DPM, use IPMI to wake up the host.

Procedure

1. On the top navigation bar, click Hosts, and then select Cluster Management > Cluster Configuration from the navigation pane.

2. Click DPM.

3. Configure the parameters as described in "Parameters."

4. Click Save.

Parameters

• Enable DPM: Select whether to enable DPM.

• Duration: Specify the time to wait for DPM to take effect after the CPU or memory usage crosses the threshold specified in the reclaim or wakeup policy.

• Detection Interval: Specify the interval at which the system checks the CPU usage and memory usage of the hosts.

• Reclaim Policy: Select a host reclaim policy. When the load of a host remains lower than the threshold specified in the reclaim policy for the specified time period, the system automatically shuts down the host after migrating all VMs on the host to the host with the lowest memory or CPU usage.

• Wakeup Policy: Select a host wakeup policy. When the load of a host remains higher than the threshold specified in the wakeup policy for the specified time period, the system automatically wakes up hosts in shutdown state and migrates some VMs on the overloaded host to the hosts that have been woken up.