遥感数据异地备份中数据一致性方法研究与实现

Data Consistency Research and Implement in Remote Sensing Data Remote Backup

近年来,遥感数据的备份与容灾是数据存储与安全领域内备受关注的问题。异地备份的目的是实现数据的互备份和互检索,实现遥感数据动态备份与快速恢复。本文根据遥感数据异地备份自身的特点,在借鉴分布式数据库系统中维护数据一致性方法的基础上,提出了基于消息队列机制的异步复制控制法、差错控制法和同步文件比对法3种维护遥感数据一致性的方法,同时对这3种方法的区别和联系进行了初步分析。

In recent years,the backup and disaster recovery of remote sensing data have gained more and more concern in the area of data storage and security.The aim of remote backup is to achieve mutual backup,mutual search,dynamic backup and rapid recovery of remote sensing data.According to its own characteristics of remote sensing data remote backup and based on the approaches of maintaining data consistency in distributed database system,this paper raises message-based control method of asynchronous replication,error control method and consistent file comparison method to maintain the consistency of remote sensing data.Meanwhile,it conducts a preliminary analysis on the differences and connections among the three methods.