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Oracle VM is based on the Xen Hypervisor, but there is more to Oracle VM than just the server software itself. Oracle has taken the Xen Hypervisor and added enhancements and fixes as well as improved the management of the virtualized environment. Oracle VM is made up of two components: the Oracle VM Server and the Oracle VM Manager.
The Oracle VM Server, which is based on the Xen Hypervisor technology, has been enhanced to provide better manageability, scalability, and supportability. In addition to modifying the Xen Hypervisor for their own product, Oracle’s engineering team contributes to the development of the mainstream Xen software.
The Oracle VM Server is the application that actually manages and runs the virtual guests. The Oracle VM Server, which is installed on a bare system, consists of the Xen Hypervisor and a dom0 guest that is used for management and monitoring, and the OVS agent that runs within dom0. As you will see throughout this book, the Oracle VM Manager is what really makes much of Oracle VM work. Features of the Oracle VM Server include: