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Oracle VM Implementation and Administration Guide by Edward Whalen

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Xen Architecture

The core of the Oracle VM system is the software that runs the virtual machines. This software is the Xen virtualization system. The Xen virtualization system consists of the Xen Hypervisor and support software. Xen is a virtual machine monitor for x86, x86_64, Intel Itanium, and PowerPC architectures (Oracle only supports the x86 and x86_64 architectures). At the core of the Xen virtualization system is the Xen Hypervisor.

The Xen Hypervisor is the operating system that runs on the bare metal server. The guest OSs are on top of the Xen Hypervisor. The Xen Hypervisor, after booting, immediately loads one virtual machine: dom0. Dom0 is nothing more than a standard virtual machine but with privileges to access and control the physical ...

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