基于网络编码的文件备份方案

Data Backup Scheme Based on Network Coding

针对数据备份需占用大量空间和需额外手段对其安全保密性进行保护的问题,提出了一种基于网络编码技术的文件备份方案,其核心是对多个备份文件进行网络编码操作,生成编码备份文件后存储于备份服务器中。该方案包括以下部分:备份的基本原理、备份过程、文件更新对备份恢复的影响和处理、备份的更新和全局备份控制系统。实验与理论分析表明,该方案较传统备份方案大幅节省了存储空间,提高了备份文件的安全保密性,但文件的可恢复性微降并增加了系统的复杂度。

According to the problems that data backup needs a lot of storage space and its safe privacy needs to be pro- tected, a file backup scheme based on network coding was proposed. Specifically, adopting network coding,many backup files are encoded into one encoded file, and then saved in the backup server. This scheme includes the following aspects： the principle of backup, the process of backup, influence of file update on recovery and how to handle it,backup file up- date and the global control system. Experiment and theoretical analysis show, compared with traditional method, this scheme can save storage space greatly and enhance the safe privacy of the backup data, but decrease appreciably the recoverability of it and increase the complexity of the system.