基础架构专家可以垂直扩展或收缩虚拟服务器或存储区域块。
The infrastructure specialist can scale up or down virtual servers or blocks of storage area.
简单地说，应用程序虚拟化是其底层应用程序基础架构资源(比如应用程序服务器和集群)的一个抽象。
At its simplest, application virtualization is the abstraction of the application from its underlying application infrastructure resources, such as application servers and clusters.
这个简化的服务器虚拟化架构如图 4 所示。
The simplified architecture for server virtualization is shown in Figure 4.
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