【摘要】 为解决异地数据容灾系统中多时间点备份对存储空间的浪费问题,提出一种基于存储动态映射的多时间点备份方法.通过元数据共享、写时动态映射实现共享数据的单实例存储和备份存储空间的按需分配,结合缓存技术,提高备份数据的局部连续性.实验结果表明,该方法可以有效降低多时间点备份对存储空间的开销,同时保证较高的恢复性能.更多还原

【Abstract】 This paper presents a Multi-time Point Backup Approach(MPBA) based on Storage Dynamic Mapping(SDM),to bring down the overhead of storage space for multi-time point backup in remote backup system for data disaster tolerance.By employing the strategy of metadata sharing and mapping on writing,it avoids storing multiple instances of sharing data and allocates storage space on demand. Combining with data caching,it improves the local continuity of backup data.As the experiment shows, it reduces the overhead of storage space effectively and provides a good recovering performance.更多还原