5. Physical Domains
Virtualization technologies have breathed new life into the concept of consolidated workloads, returning to this earlier model from the model of one workload per server. However, the use of virtualization can lead to an environment with “too many eggs in one basket” and the risk of a complete service outage, including all related workloads, due to one hardware failure. In that situation, a combination of virtualization and partitioning is more appropriate.
The consolidated workload form of server virtualization relies on the ability to group multiple subsets of resources in a server. Physical domains ensure that each group is not only software fault isolated, but also fully hardware and electrically fault ...