位图技术在备份系统设计应用中的研究

Bitmap Technology Applications in the Backup System

本文引入位图技术，采取增量备份方式，消除备份窗口，缩短备份时间；通过命令行方式调用卷影复制服务框架（VSS框架），把文件系统缓存中的数据转存到磁盘上，保证了数据的一致性。采用分层模式开发的基于主机侧的备份软件Ddp，很好地解决了集中管理多台服务器的问题。

This paper introduces the bitmap technology which takes incremental backup to eliminate,the backup window and greatly reduce the backup time.Through the command-line mode invocating Volume Shadow Copy fi＇amework（VSS framework）,we transfer the cache data in file system to ensure data consistency.By introducing the backup software Ddp developed according to host-side based hierarchical model,we provide a good solution to settle the issue of centralized management for multiple servers.