Which feature of vSphere allows for automated load balancing of resources?

The Distributed Resource Scheduler (DRS) is the feature of vSphere that enables automated load balancing of compute resources across a cluster of virtual machines. DRS actively manages the distribution of workloads based on the resource usage and demand of the virtual machines within the cluster. It evaluates the resource allocation of each VM against the cluster’s capacity and migrates VMs as necessary to ensure optimal performance and efficiency.

When resource utilization exceeds a certain threshold on a host, DRS can automatically initiate actions such as VM migration (using vMotion) to redistribute workloads, helping to maintain equitable performance across the whole cluster. This dynamic balancing ensures that VMs are not starved of necessary resources, which leads to better performance and resource utilization.

Other features mentioned relate to different aspects of virtualization. VMware Mirage is focused on desktop management and provisioning, vSphere Replication provides data protection by allowing VMs to be replicated to different locations, and Storage DRS manages storage resources for VMs but does not specifically address overall host compute resource balancing like DRS does.