异步非阻塞瓦片地图服务器的实现

An asynchronous non-blocking tile map server based on NodeJS

针对WebGIS用户数量不断增大,导致瓦片地图服务器的负载压力越来越大不能满足高并发的需求的问题,该文提出了一种基于NodeJS的异步非阻塞地图服务器,通过提高读取瓦片的效率来提高服务器性能。深入研究了ArcGIS紧凑型地图瓦片数据存储格式,利用NodeJS解析ArcGIS紧凑型瓦片地图文件实现了非阻塞异步地图瓦片服务器,最后利用WAST对NodeJS和ArcSever瓦片服务进行压力测试。结果表明基于NodeJS的异步非阻塞瓦片地图服务器有更高的访问效率和并发性,以及更低的响应延迟,适合构建企业级大用户量的WebGIS应用。

With the continuous development of WebGIS, WebGIS application penetration into all areas of so cial life, the number of users is increasing, the pressure of tile map server cannot meet the growing demand for high concurrency. This paper proposed an asynchronous non-blocking map server based on NodeJS by improving the efficiency of reading tiles to improve server performance. The ArcGIS map tiles compact data storage format was studied, and using NodeJS parsing ArcGIS compact tiles map file to implement the asynchronous non-blocking tile map server. Finally, WAST was used to stress test for NodeJS and ArcSever map server. Experimental results showed that non-blocking asynchronous tile map server based on NodeJS was with higher access efficiency, higher concurrency and lower response delay for building enterprise-class large amount of users WebGIS applications.