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云计算具有可扩展性和高可用性的特点,能够快速配置和调度服务资源,按需为用户提供弹性的GIS服务。基于典型实例剖析了GIS云计算系统的框架结构,介绍了与GIS云计算系统框架结构相关的Web应用服务器工作原理,讨论分析了所用典型实例中云计算系统各组件的地位与作用。从可扩展性和高可用性的角度对GIS云计算系统框架结构的实现方式进行了较为深入、全面的探讨,归纳了负载均衡与动态扩展在向GIS服务提供自适应性计算资源和提高云计算系统容错性方面以及面临用户数量与地理空间数据使用量增加时在保持云计算系统高性能与高资源利用方面的作用以及相关方法,总结了借助云计算技术自动获得弹性计算资源和构建高效稳定GIS应用的技术途径与手段。
Cloud computing scalability and high availability features, can quickly configure and schedule service resources, as needed to provide users with flexible GIS services. Based on typical examples, this paper analyzes the framework of GIS cloud computing system, introduces the working principle of Web application server related to the framework of GIS cloud computing system, and discusses the status and function of each component of cloud computing system in typical examples. From the perspective of scalability and high availability, this paper discusses the implementation of GIS cloud computing system architecture in-depth and comprehensively, summarizes the advantages of load balancing and dynamic expansion in providing adaptive computing resources to GIS services and improving cloud computing system Fault tolerance and the role of users in maintaining the high performance and high resource utilization of cloud computing systems in the face of the increasing number of users and geospatial data, as well as related methods, summarizes the automatic availability of elastic computing resources and the construction of efficient and stable GIS applications with cloud computing technology Technical means and means.