空间信息网格中动态复制策略的研究  

Research of Dynamic Replication Strategies in Spatial Information Grid

作　　者：谢储晖[1] 郭达志[1] 

机构地区：[1]中国矿业大学测绘与空间信息工程研究所

出　　处：《东华理工学院学报》2005年第2期179-183,共5页Journal of East China Institute of Technology

基　　金：福建省自然科学基金计划资助目(D0410023);福建省教育厅计划项目(JB04164)

摘　　要：空间信息网格项目数据量大,用户遍及各地,对数据文件的请求延时大、占大量带宽。复制可以节省带宽、减少时延、均衡负载、改善系统可靠性。采用动态复制技术可以使用户有效地获得所需的数据。详细地论述了动态复制策略以及空间信息网格中的复制管理机制、复制服务流程和具体实施。Spatial information grid generates large amounts of data needed to be able to share it with user around the world. Request for a file, large amounts of bandwidth could be consumed to transfer the file from the server to the client. Furthermore the latency could be significant considering the size of the files involved. Replication can reduce the access latency and bandwidth consumption, and can help in load balancing, and can improve reliability by creating multiple copies of the same data. Static replication can not been adapted to change in user behavior. For user's choose we need dynamic replication strategies, where replica creation, deletion and management are done automatically. Dynamic strategies have the ability to adapt and to changes by user behavior. This article discusses detailedly dynamic replication strategies, replica management machanism,replica service process and implementing method.

关 键 词：空间信息网格 复制 动态复制策略 复本目录 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]