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中文摘要：
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.
英文摘要：
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.
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