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云计算应用程序架构概览和不同架构之间的比较
* * * So what would a platform based on the web services model look like? [build] At the bottom, you would still have a variety of hardware running server operating systems and server software. [build] And at the top, you would still have the devices that users can use to access the Internet. So far, this looks pretty familiar – just like the Web of today. But the problem right now is that in order to access services on different servers, users need to manually repoint their browsers from one server to another, and they don’t have a way to integrate the information that is available to them from different servers – even if the information is closely related. They also need to configure their preferences and information separately from every device, and separately for each of the server applications they access. [build] So, to deal with the problem of aggregating the information on the different servers for the user, and consolidating things like user preferences and logins, you introduce a web services layer. [build] And to bundle together and rationalize the variety of web services that a user will want to access, you create user experiences which offer a coherent and individually-tailored set of web services to the user, which they can access from any of their devices – cell phones, PCs, PDAs, and so on. [build] Now the user has a completely different kind of Internet experience, where they can access from any device (any time anywhere) their custom-made user experience, which will in turn access all of the different web services they need to manage their information and activities in a consolidated fashion, regardless of where the actual servers are that the data and applications are running on. * Microsoft is building a platform to make all of this possible. That platform is called .NET. With Windows 2000 and the .NET Enterprise Servers, we have already delivered many of the foundation pieces of the platform. Visual Studio.NET and the .NET Framework are c
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