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SQL Performance Tuning by Trudy Pelzer, Peter Gulutzan

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Chapter 16. Clients and Servers

The simplest client/server system has a client and a server, as Figure 16-1 illustrates. Commonly, though, a system involves more than one client and includes middleware between the client and the server, as Figure 16-2 shows. We could draw several more architecture diagrams showing more clients, more middleware, and more servers. We could add hardware pictures if each component is on a separate machine. We could put in more components that are technically outside the system, such as an Apache Web Server. But Figures 16-1 and 16-2 are reasonably truthful depictions of reality. The fact is, as Robert Orfali and Dan Harkey have observed, “Over 80% of the existing client/server installations are single server and have ...

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