基于信息冗余的数据完整性保障技术

数据信息是计算机应用系统中最重要的资源，为保障数据完整性，必须重视信息冗余技术使用及其管理问题，信息冗余包括备份和校验两种方法，除了常规的简单复制备份而外，镜像备份是重要的企业级备份技术，高级别的RAID系统中采用镜像备份或校验冗余来确保可靠性，但不同级别的RAID在存储性能和可靠性方面存在差异。备份技术在实际应用中还涉及到系统结构备备策略，方式，介质及管理问题，为有助于澄清目前国人出版物上关于存储保障技术存在的某些混乱看法，本文对备份技术，RAID系统等着重作了深入分析，对镜像与校验信息冗余方法的效率作了比较讨论。

Data integrity and security technology based on information redundancy

Data information is the most important resource in the applied system of computer. To safeguard data integrity, information redundancytechnology, mainlyincluding backup (copy backup and mirror backup) and check, should be used. In the present paper the author first discusses the backup technology and the RAID system. Then a comparison between the efficiency of the mirror information redundancy and that of check information redundancy is made.