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虚拟化 ---FULL Virtualization 与 Para Virtualization .

佘飞鸣
2023-12-01

Guest operating systems are hosted on virtual machines in either full virtualization
mode or paravirtual mode. Each virtualization mode has advantages and disadvantages.
• Full virtualization mode lets virtual machines run unmodified operating systems,
such as Windows* Server 2003 and Windows XP, but requires the computer running
as the VM Host Server to support hardware-assisted virtualization technology, such
as AMD* Virtualization or Intel* Virtualization Technology.
Some guest operating systems hosted in full virtualization mode, can be configured
to run the Novell* Virtual Machine Drivers instead of drivers originating from the
operating system. Running virtual machine drivers improves performance dramatically
on guest operating systems, such as Windows XP and Windows Server 2003.
For more information, see Chapter 14, Virtual Machine Drivers (page 119).
• Paravirtual mode does not require the host computer to support hardware-assisted
virtualization technology, but does require the guest operating system to be modified
for the virtualization environment. Typically, operating systems running in paravirtual
mode enjoy better performance than those requiring full virtualization mode.
Operating systems currently modified to run in paravirtual mode are referred to as
paravirtualized operating systems and include SUSE Linux Enterprise Server 11 and
NetWare® 6.5 SP8.

 

核心说明:

Full Virtualization: 需要 硬件有  hardware-assisted  virtualization technology (Intel-VT,AMD-V)硬件辅助虚拟化技术,操作系统代码原生不需要任何修改,性能一般.

Para Virtualization :不需要硬件辅助虚拟化技术,但是需要客户操作系统代码做修改包含虚拟化代码,性能更高.

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