基于云计算的并发访问密集型WebGIS QoS研究

Research on the QoS of Intensive Concurrent Accessing WebGIS Based on Cloud Computing

Internet技术的发展,促进了WebGIS技术的变革。随着网络用户需求的增长,在并发访问密集情况下,WebGIS处理延迟和拒绝服务的现象不可避免,使得端到端的服务质量(Quality of Services,QoS)得不到保证。本文利用云计算技术与WebGIS相结合,建立虚拟云平台服务器,以增强WebGIS服务器的并发处理性能。使用LoadRunner进行仿真实验,体现了云计算平台在WebGIS服务中的优越性。

With the development of Internet, it dramatically promotes the evolution of WebGIS technology. As the growth of the Intemet users demand, it will be an inevitable phenomenon that WebGIS applications delay and deny of service sometimes under the intensive concurrent accessing circumstance, which make the quality of service （QoS） of the end-to-end users not be guaranteed. Combined the WebGIS with the cutting-edge Cloud Computing technology, the research implemented a virtual cloud server platform to enhance the WebGIS server processing performance. From the simulation experiments with LoadRunner, it can be found that Cloud Computing can significantly facilitate the WebGIS applications to obtain better QoS of WebGIS.