Novell LINUX ENTERPRISE SERVER 10 - INSTALLATION AND ADMINISTRATION 04-08-2006 Installation Manual page 441

Figure 23.3 VM Device Drivers
Paravirtual Machine
Applications
Operating System
VM Definition
(Xen devices)
If, for example, a VM's operating system running in full-virtualization mode needs to
save a file on its virtual 20-GB disk drive, the operating system passes its request through
the device driver to the VMM. The VMM understands which portion of the 500-GB
physical disk the VM has access to and passes instructions to the VM Server. The VM
Server accesses the disk drive and writes the file to the pre-defined location on the 500-
GB disk.
Depending on your computing needs and available computer resources, any number of
VMs can be created and can simultaneously run on the VM Server. The operating system
of each VM interacts independently with the VMM and VM Server platform to consume
virtual or emulated CPU, memory, block device, and network resources.
Figure 23.4 VM Server and Virtual Machines
Virtual Machine 1
VM Server
Applications
Operating System
VM Server Desktop
SUSE Linux
VM 1 Definition
Physical Computer Hardware
Fully Virtual Machine Fully Virtual Machine
Applications Applications
Operating System Operating System
VM Definition VM Definition
(emulated devices) (emulated devices)
Virtual Machine 2
Applications
Operating System
VM 2 Definition
Virtual Machine Monitor
Virtual Machine 3
Applications
Operating System
VM 3 Definition
Virtual Machine Server 441