云计算的一个承诺就是虚拟化将会减少所需服务器的数量，这会导致在硬件、软件许可证、能源和维修上的减少。
One promise of cloud computing is that virtualization will reduce the number of servers needed, leading to reductions in hardware, software licenses, energy, and maintenance.
不好的一面是，由于虚拟化软件互操作性方面的问题，虚拟化后的服务器有可能不能从一个厂商转移到另一个厂商。
One downside is that virtualized servers may not be transferable from one vendor to another due to interoperability issues of the virtualization software.
虚拟化对硬件进行了最大程度的抽象，甚至不需要将软件堆栈绑定到特定的物理服务器就可以执行部署和重新部署。
Virtualization completely abstracts the hardware to the point where software stacks can be deployed and redeployed without being tied to a specific physical server.
虚拟化与云计算技术对传统的软件许可模式(比如说每个用户一个许可、每个服务器一个许可)提出了挑战。
Both Virtualization and Cloud Computing technologies pose significant challenges to traditional software licensing schemes (e.g. one license per user, one license per CPU or server).
虚拟机管理程序(hypervisor)是一个较薄的虚拟化软件层，它抽象化来自服务器平台的操作系统和应用程序。
The hypervisor is a thin layer of virtualization software that abstracts the operating system and applications from the server platform.
重量级公司正鼓励客户购买虚拟化软件，它能使得单台服务器上运行更多商业应用。
The heavyweights are encouraging customers to buy virtualization software, which makes it possible to run more business applications on each individual server.
重量级公司正鼓励客户购买虚拟化软件，它能使得单台服务器上运行更多商业应用。
The heavyweights are encouraging customers to buy virtualization software, which makes it possible to run more business applications on each individual server.
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