摘要
为了解决传统的C/S架构下遥感数据传输速率慢的问题,提出了一种基于多源FTP的并行下载思想,采用分布式架构以多副本形式存储数据,利用二分法动态获取不同大小的数据块,同时采用断点续传方法保证数据下载完整性,最后合并为一景完整的遥感数据。通过实验对比表明,该方法提高了数据的下载速率,改善了用户下载体验。
In order to solve the problem of slow remote sensing data transmission rate under the traditional C/S architecture,a parallel download idea based on multi-source FTP is proposed.The distributed architecture is used to store data in multiple copies,and dichotomy is used to dynamically obtain different sizes of data block,while the use of breakpoint continuingly method to ensure data download integrity,and finally merged into a complete remote sensing data.Experiments show that this method improves the download rate of data and improves the user downloading experience.
作者
张帅民
黄祥志
王栋
Zhang Shuaimin;Huang Xiangzhi;Wang Dong(Institute of Data and Knowledge Engineering,Henan University,Kaifeng Henan 475004,China;College of Computer and Information Engineering,Henan University,Kaifeng Henan 475004,China;Institute of Remote Sensing and Digital Earth,Chinese Academy of Sciences,Beijing 100101,China)
基金
1.高分重大专项课题“地球表层系统科学研究应用示范系统(一期)”(Y4D00100GF)
2.高分重大专项课题“基础信息产品生产算法集成研究”(Y4D0100038)
3.中科院战略先导专项课题“气溶胶关联的云参数卫星遥感”(Y1Y02230XD)。
关键词
遥感数据
FTP
数据传输
数据分块
二分法
断点续传
Remote Sensing Data
FTP
Data Transmission
Data Block
Dichotomy
Breakpoint Continuingly
