CDRS:云存储中一种代价驱动的自适应副本策略  

CDRS:an adaptive cost-driven replication strategy in cloud storage

作　　者：徐婧[1] 杨寿保[1] 王淑玲[1] 刘晓茜[1] 

机构地区：[1]中国科学技术大学计算机科学与技术学院,合肥230026

出　　处：《中国科学院研究生院学报》2011年第6期759-767,共9页Journal of the Graduate School of the Chinese Academy of Sciences

基　　金：国家自然科学基金(60673172);国家高技术研究发展计划(863)项目(2006AA01A110);中国科学技术大学创新基金(KD0901110;KD0901109)

摘　　要：针对云存储环境下突出的一些新问题,如网络的广域性与动态性、商业利益的追求、一致性与可用性的权衡等,提出了一种代价驱动的自适应副本策略CDRS.该副本策略通过引入市场机制中的代价,综合考虑负载平衡及一致性与可用性的均衡,对副本进行自适应的操作,达到最小化副本开销和最大化副本收益的目标.实验结果表明,与传统的副本策略相比,该策略在副本收益以及负载均衡方面有着更大的优势.Considering the new problems in cloud storage environment,such as wide location,dynamic characteristic,pursuit of commercial interests,and trade-off between consistency and availability,we propose a dynamic cost-driven replication strategy（CDRS）.By introducing cost in market mechanism and considering load balancing and the trade-off between consistency and availability comprehensively,this strategy operates adaptively on replication and achieves the goal of minimizing replication cost and maximizing replication profit.The experimental results show that CDRS has a better performance in both replication profit and load balancing.

关 键 词：代价驱动 地理特性 自适应 云存储 

分 类 号：TP273.2[自动化与计算机技术—检测技术与自动化装置]