基于集群技术的高性能混合动态地图服务应用研究

Application of the high-performance mixed dynamic map service based on cluster

针对静态瓦片地图服务空间信息不完整和数据更新滞后、动态地图服务响应速度慢和高并发访问服务器压力大的问题,结合两种地图服务的优势,文章提出一种新的基于集群技术的高性能混合动态地图服务方法。基于服务器集群技术,设计一种支持高并发可伸缩的动态地图服务模式,采用两级中控调度服务和相应的负载均衡技术解决了高并发请求时地图服务效率和正确性问题。通过将该地图服务框架应用于国土资源地质灾害应急平台实际应用的实践证明,其能为多用户提供支持高并发、时效性强和可靠性高的WEBGIS应用地图服务。

With the rapid development of WEBGIS during the last decade, there is an urgent need of solving the issues of the traditional tiled map service, such as incomplete spatial information and data update lagging for static tiled map services, slow response and peak load under the high concurrent visits for the dynamic tiled map services. In this paper, we propose a new map service data model, and design a scalable dynamic map service mode, which is able to deal with intensive concurrent access. Combined with server clustering technology, the framework uses two level control scheduling service and load balance schema to solve the efficiency and data correctness problems during intensive concurrent visits. With the experiment of applying the framework in the emergency platform application of homeland geological disaster, the results show that the proposed framework can provide the high concurrent supported, rapid response and high reliability map service for multiple users.