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| .Net环境下空间数据缓存方案的设计与实现 | |
| 引用本文： | 李滨,侯小牛,常德海,陈欣..Net环境下空间数据缓存方案的设计与实现[J].海洋测绘,2009,29(3):34-37. |
| 作者姓名： | 李滨 侯小牛 常德海 陈欣 |
| 作者单位： | 1. 解放军信息工程大学,测绘学院,河南,郑州,450052 2. 河南大学,环境与规划学院,河南,开封,475004 3. 68011部队,甘肃,兰州,730020 |
| 摘 要： | 空间数据查询效率的优劣决定着三层体系结构空间信息系统的应用效果。空间数据缓存技术是提高空间数据查询效率的有效方法之一。在数据缓存技术逐渐成熟的今天，如何利用数据缓存技术来构建空间数据缓存是目前研究的热点。基于Microsoft新的数据缓存技术，借助常用的格网索引，在客户端和应用服务器端开辟空间数据缓存区，以降低数据的传输量，减少用户的请求响应时间，从而提高空间数据查询效率。在利用版本控制技术实现空间数据缓存的同时，解决客户端、应用服务器和数据库服务器的数据一致性问题，确保空间数据的有效性和可用性。 |
| 关 键 词： | 空间数据缓存 TTL机制 版本控制 |
The Design and Experiment of Spatial Data Cache in the . Net Environment |
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| LI Bin,HOU Xiao-niu,CHANG De-hai,CHEN Xin.The Design and Experiment of Spatial Data Cache in the . Net Environment[J].Hydrographic Surveying and Charting,2009,29(3):34-37. | |
| Authors: | LI Bin HOU Xiao-niu CHANG De-hai CHEN Xin |
| Institution: | 1. Institute of Surveying and Mapping, Information Engineering University, Zhengzhou, Henan ,450052; 2. College of Environment and Planning, Henan University, Kaifeng,Henan ,475004 ; 3. 68011 Troops, Lanzhou, Gansu ,730020) |
| Abstract: | In the spatial information systems based on the architecture of C/S or B/S, the efficiency of the spatial data querying determines the application of the spatial information system. The technique of spatial data buffering is the efficient method which improve the efficiency of the spatial data querying. It is a focus how to use the data buffering to build the spatial data buffering. In order to improve the efficiency of the spatial data querying, based on the new data buffering technique of Microsoft, the spatial data buffers are built on the clients and the application server which reduce transmitting of spatial data and responding of user query. The technique of version control which ensure the efficiency and availability of spatial data is used to build spatial data buffer and solve the coordination among the clients, the application server and the database server. |
| Keywords: | spatial data buffering TTL version control |
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