What feature in VMware allows for the automatic start-up of VMs after a host failure?

The Automatic Restart feature of vSphere High Availability (HA) is designed to ensure that virtual machines (VMs) are automatically restarted on a different host in the event of a host failure. This capability enhances the overall availability and resilience of the virtualized environment. When a host becomes unresponsive or fails, vSphere HA identifies the VMs that were running on that host and attempts to restart them on other available hosts in the cluster.

This process occurs without manual intervention, allowing for minimal downtime and ensuring business continuity. The feature works by monitoring the health of the hosts and VMs in a cluster and employs a heartbeat mechanism to detect failures. Once it confirms a host failure, it quickly relocates and powers on the affected VMs on other operational hosts, thereby maintaining service availability.

In contrast, other options like VMware DRS, VMware Tools, and VM snapshots serve different purposes within the VMware ecosystem. While DRS optimizes resource allocation and load balancing among hosts by automatically migrating VMs, VMware Tools provides essential drivers and applications for enhanced performance and management of VMs. VM snapshots, on the other hand, are used to capture the state of a VM at a specific point in time, allowing for recovery or rollback, but do not inherently manage automatic