摘要
为解决现有块级持续数据保护技术对系统写性能影响过大的问题,通过对CDP读写过程进行研究分析,设计了一种Linux下基于设备映射机制的块级CDP系统设计方案。该方案使用缓存队列和后台数据同步技术,减少写操作时的磁盘IO操作次数,并通过读状态映射表实现数据的正确读取。测试结果表明,该方案在较少损失系统读性能的条件下,可获得较高的写性能。
In order to resolve the problem of large effect on write performance that exist in traditional block level continuous data protec-tion system,a new block-level CDP technology based on Linux device mapper level is proposed.The new technology can reduce times of write-IO by using cache-queue and background synchronously flushing technology,and read the newest data by read mapping table.The test result shows that the method has high write performance on the condition of make read performance a little lower.
出处
《计算机工程与设计》
CSCD
北大核心
2010年第24期5224-5226,5261,共4页
Computer Engineering and Design
