一种在去重备份系统中数据完整性校验算法  

Data integrity verification algorithm in data duplicate backup system

作　　者：韩莹[1] 王茂发[1] 张艳霞[1] 

机构地区：[1]防灾科技学院灾害信息工程系,河北廊坊065201

出　　处：《计算机应用研究》2015年第6期1819-1821,共3页Application Research of Computers

基　　金：中央高校基本科研业务费专项资金资助项目(ZY20140215)

摘　　要：在数据备份系统中,使用重复数据删除技术在消除重复数据提高系统存储的空间效率时,将必然会有多个逻辑映像共享去重后的数据实例,如果某个数据实例丢失或者数据被更改,将导致所有引用该实例的逻辑映像均发生错误,因此提出了一种在去重备份系统中数据完整性验证算法。如果当前备份的文件在数据服务器端已经存在数据实例,添加引用之前先对被引用的数据实例进行分块循环顺序校验,判断数据实例的完整性。实验结果证明,这种添加验证码的去重合成备份算法不仅不影响备份速度,而且对备份系统中被引用的数据实例的完整性提供了一种验证的算法。这种数据完整性校验算法提高了去重备份系统的可靠性。In data backup systems, the use of data de-duplication in eliminating duplicate data to improve the efficiency of system storage space, will inevitably make many logical images share the data instance. The shared data is lost or changed which will cause all cited the example of logical image error. Therefore, this paper proposed a data integrity verification algorithm in data duplicate backup system. If the current backup file already existed in the data instance data server, before adding reference, it was first to use block cyclic sequence check referenced data example to judge the integrity of data in- stances. The experimental results show that the algorithm doesn＇t affect the backup speed, but also provides a validation of the algorithm on the integrity of cited backup system data instance. The algorithm improved the reliability of duplicate removal backup system.

关 键 词：数据去重 数据备份 固定分块 数据完整性校验 

分 类 号：TP309.3[自动化与计算机技术—计算机系统结构]