基于纠删码的动态副本冗余存储研究  

Research on dynamic replication redundancy storage strategy based on erasure code

作　　者：郑志蕴[1] 孟慧平 李钝[1] 王振飞[1] 

机构地区：[1]郑州大学信息工程学院,河南郑州450001

出　　处：《计算机工程与设计》2014年第9期3085-3090,共6页Computer Engineering and Design

摘　　要：为保证数据的完整性和可靠性,云存储中主要采用多副本和纠删码两种存储策略对数据进行冗余保存。针对单一冗余存储策略的不足,考虑存储开销和访问质量等方面因素,根据用户访问数据的规律,提出一种基于纠删码的动态副本冗余存储方案。采用RC纠删码来存储云中海量数据,使用曲线拟合预测访问热度,适时调整副本的数量。实验结果表明,该方案空间利用率高,能有效减小用户访问的平均延迟,提高用户访问的成功率。The storage systems use multiple-replication strategy and erasure code strategy to ensure the integrity and reliability of the data. Aiming at the shortage of single redundant storage strategy and considering the storage overhead and the auess quality, a dynamic replication based on erasure code redundancy storage solution, namely DRBEC, was presented according to the law for accessing the data. RC was used to store huge amounts of data and the number of copies was adjustad by forecasting accessing heat of files to make full use of the high I/O throughput performance of multiple-replication. The results of experiments in analogous cloud storage system show that DRBEC effectivelys reduces the average latency of accessing and improves the visit quality.

关 键 词：云存储 纠删码 预测 动态副本 冗余存储 

分 类 号：TP399[自动化与计算机技术—计算机应用技术]