The vSphere 5.0 Upgrade Best Practices paper provides an overview of the ESXi 5.0 upgrade process along with recommendations to help ensure a smooth and seamless transition to vSphere 5.0.
The vSphere 5.0 Operations Guide describes the architecture of ESXi and how various management tasks are performed in it. This information can be used to help plan a migration to the ESXi architecture from the legacy ESX framework and to improve or enhance day-to-day operations.
