Visit the new VMware ESX to ESXi Upgrade Center to learn about the ESXi architecture and how to upgrade from ESX to ESXi. VMware ESXi is an operating system independent hypervisor, designed to improve hypervisor management in the areas of security, deployment and configuration, and ongoing administration. All VMware vSphere features are fully supported on ESXi. VMware vSphere customers that currently only deploy ESX are strongly encouraged to visit the ESX to ESXi Upgrade Center and begin planning their upgrade from ESX to ESXi.
