Which vSphere feature works by balancing workloads to ensure high performance of virtual machines?

The vSphere Distributed Resource Scheduler (DRS) is designed specifically to enhance the performance of virtual machines by intelligently balancing workloads across the cluster's hosts. DRS automates the process of resource allocation and load balancing by continuously monitoring the resource usage and performance demands of virtual machines. When a virtual machine experiences a spike in resource demand, DRS can migrate it to a host with available resources, ensuring optimal performance and minimizing contention.

This feature utilizes both load balancing and resource optimization techniques, making recommendations or automatically executing virtual machine migrations (vMotion) based on the current load status of the cluster. By doing so, DRS helps maintain service levels for applications running in virtual machines while preventing any single host from becoming a bottleneck.

In contrast, while other features such as vSphere Replication, Fault Tolerance, and High Availability provide essential capabilities for data protection, disaster recovery, and uptime, they do not focus on the continuous optimization of workload distribution to enhance performance like DRS does.