How can an administrator be alerted whenever a host power state changes?

To effectively monitor changes in the power state of a host, enabling email notifications is a proactive approach for an administrator. When this feature is set, the system can automatically send out alerts to predefined email addresses whenever there is a change in the power state of a host. This allows the administrator to be immediately informed of events such as a host powering on or off, which is crucial for maintaining the health and uptime of virtual infrastructures.

Setting this type of notification ensures that any critical changes do not go unnoticed, facilitating a swift response to potential issues that could impact services or availability. The ability to receive real-time alerts enhances the administrator's capability to manage and troubleshoot the environment effectively.

In contrast, while setting a condition to show as critical or enabling Power Alarm in the Direct Console User Interface (DCUI) can indicate issues, these actions do not inherently involve notifications being sent out, making them less effective for immediate awareness compared to email alerts. Enabling DPM (Distributed Power Management) on the cluster pertains more to resource efficiency and energy management rather than alerting the administrator about power state changes.