一种基于重复数据删除的Oracle数据库备份系统

摘要

针对在数据备份服务器中存在大量重复数据的问题,提出了一种基于重复数据删除技术的oracle数据库备份系统.系统首先生成临时备份文件,然后把临时文件划分成不重叠的块,通过哈希算法计算每个块的指纹值.在数据灾备中心建立hash表记录已存储数据块的指纹值.通过对比指纹值,检测重复数据.为了提高数据安全性,采用了一定的安全机制来防止信息泄露以及数据丢失.实验证明,该系统在实现远程备份的同时,有效地减少了备份的数据.%To solve the problem of vast amount of duplicate data in the data backup server,a oracle database backup system with data de-duplicate is proposed.The system first generates a temporary backup file,then the temporary file is divided into non-over?lapping blocks, fingerprint values calculated for each block through hash algorithm.at the disaster recovery center it sets up the hash table to records the stored fingerprint of the data block.By comparing the fingerprint value to detect duplicate data. In order to improve data security,take some security mechanisms to prevent information leaks and data loss.The experiment shows that the system can reduce backup data effectively in the remote backup.