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客户机/服务器两层结构的局限性 在传统两层客户机/服务器执行结构模式下,所有应用程序逻辑和图形用户界面(GUI)的处理都在客户机上完成,而所有的数据库管理系统(DBMS)的处理则在服务器上完成。由客户机向服务器传递SQL程序。通过这种方法,第一代战术客户机/服务器工具在快速访问基本数据的应用程序方面取得了成功。 但是,这种两层模式和用来建立两层应用程序的工具在建立更大的、更复杂的系统方面却暴露出明显的不足。采用两层客户机/服务器工具建立企业级系统的主要问题在于其效率,可维护性和安全性等方面的严重不足。
Client / Server Two-Tier Architecture Limitations In the traditional two-tier client / server execution structure model, all application logic and GUI processing was done on the client machine, and all database management systems (DBMSs ) Processing is done on the server. Passed by the client to the server SQL program. In this way, first generation tactical client / server tools have been successful in quickly accessing basic data applications. However, this two-tier model and the tools used to build two-tiered applications reveal significant deficiencies in building larger, more complex systems. The main problem with building two-tier client / server tools for an enterprise-wide system is its serious lack of efficiency, maintainability, and security.