全虚拟化与半虚拟化的区别

1.全虚拟化：
全虚拟化于 1966 年由 IBM 推出。它是服务器虚拟化的第一个软件解决方案，使用二进制翻译和直接方法技术。在完全虚拟化中，来宾操作系统被虚拟机与虚拟化层和硬件完全隔离。 Microsoft 和 Parallels 系统是完全虚拟化的示例。

2. 半虚拟化：
半虚拟化是 CPU 虚拟化的类别，它使用超级调用进行操作以在编译时处理指令。在半虚拟化中，来宾操作系统不是完全隔离的，而是由虚拟机与虚拟化层和硬件部分隔离的。 VMware 和 Xen 是半虚拟化的一些例子。

全虚拟化和半虚拟化的区别如下：

S.No.	Full Virtualization	Paravirtualization
1.	In Full virtualization, virtual machine permit the execution of the instructions with running of unmodified OS in an entire isolated way.	In paravirtualization, virtual machine does not implement full isolation of OS but rather provides a different API which is utilized when OS is subjected to alteration.
2.	Full Virtualization is less secure.	While the Paravirtualization is more secure than the Full Virtualization.
3.	Full Virtualization uses binary translation and direct approach as a technique for operations.	While Paravirtualization uses hypercalls at compile time for operations.
4.	Full Virtualization is slow than paravirtualization in operation.	Paravirtualization is faster in operation as compared to full virtualization.
5.	Full Virtualization is more portable and compatible.	Paravirtualization is less portable and compatible.
6.	Examples of full virtualization are Microsoft and Parallels systems.	Examples of paravirtualization are VMware and Xen.