By contrast, the virtualization that is a key component of cloud computing makes it appear that onesystem is many individual servers.
相比之下，作为云计算关键组件的虚拟化使其表现为一个系统是许多单独的服务器。
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For large projects, the jury is still out, although such efforts can certainly benefit from a program-based approach with multiple continuous integration streams, one for each system or component.
The POLA states that a system should be partitioned into components in such a way that an inevitable bug in onecomponent cannot propagate into another component and do damage there.