基于连续写入的块级CDP优化方法  

Block-level CDP optimization method based on continuous writing

作　　者：毛艺萍 胡晓勤 MAO Yi-ping;HU Xiao-qin(School of Cyber Science and Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学网络空间安全学院,四川成都610065

出　　处：《计算机工程与设计》2023年第6期1608-1615,共8页Computer Engineering and Design

基　　金：国家自然科学基金项目(61872255)。

摘　　要：为解决现有的块级连续数据保护(CDP)技术备份速率低,面对海量高实时数据变化造成数据丢失、业务连续性受影响等问题,提出一种基于“一次读出,连续写入”的CDP优化方法——ORCW(one-read-continue-write)。通过只在第一次变化数据到达时将原始数据读出,后每一次都连续写入镜像卷和日志卷的方法,减少每次备份读数据的消耗。通过使用索引文件、元数据记录整合、多线程编程、缓存队列、虚拟重构等技术提高整个系统的运行效率。实验结果表明,ORCW方法能够在不影响CDP的恢复速率的前提下提高数据的备份速率,提高了CDP的整体性能。To solve the problems that the existing block-level continuous data protection(CDP)technology has a low backup rate,and massive and high real-time data changes cause data loss and affect business continuity,a method based on“one read,continuous write”,namely ORCW(one-read-continue-write),was proposed.The consumption of reading data for each backup was reduced by only reading out the original data when the first changed data arrived,and then continuously writing to the mirror volume and the log volume each time.The operating efficiency of the entire system was improved using index files,metadata record integration,multi-threaded programming,cache queues,virtual reconstruction and other technologies.Experimental results show that the ORCW method can increase the data backup rate without affecting the CDP recovery rate,and improve the overall performance of the CDP.

关 键 词：连续数据保护 数据变化 数据备份 数据恢复 连续写入 元数据记录整合 虚拟重构 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]