空闲的资源，加上J2EE 平台的崛起，迎来了云计算的概念：应用服务虚拟化。
The concept of under-utilized resources, together with the rise of J2EE platform, gave rise to the precursor of cloud computing: application server virtualization.
QEMU 是一个平台虚拟化应用程序，让您能够仿真完整的计算机（处理器和相关的外部设备），用于在其上虚拟化另一种操作系统。
QEMU is a platform virtualization application that allows you to emulate an entire computer (processors and associated peripherals) for purposes of virtualizing another operating system on it.
KVM在平台虚拟化中利用QEMU，并使用Linux作为hypervisor，因此实现了这个构思，即让来宾操作系统能够和其他Linux应用程序协调执行。
KVM makes use of QEMU for platform virtualization, and with Linux as the hypervisor, it immediately supported the idea of guest operating systems executing in concert with other Linux applications.
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