当我们在谈论 qemu、kvm、libvert的时候,我们在谈论什么?
这里的讨论对象,其实我们还可以加上xen 和 qemu-kvm。
qemu,其实是quick emulator的缩写。实际上来说,它不仅仅是一个emulator,更是一个virtualizer。下面摘录一段官网的介绍:
QEMU is a generic and open source machine emulator and virtualizer.
When used as a machine emulator, QEMU can run OSes and programs made for one machine (e.g. an ARM board) on a different machine (e.g. your own PC). By using dynamic translation, it achieves very good performance.
When used as a virtualizer, QEMU achieves near native performance by executing the guest code directly on the host CPU. QEMU supports virtualization when executing under the Xen hypervisor or using the KVM kernel module in Linux. When using KVM, QEMU