一种成本相关的云提供商高可靠性保证算法

摘要

Data reliability is a desirable feature for all cloud providers. This paper firstly illustrates the existing assurance mechanisms for data reliability and points out that the data recovery time and cost are two optimization objectives for cloud providers. Then, a novel rich cloud based disaster recovery model is introduced for cloud providers, in which a cloud provider is able to replicate data with lower cost by utilizing the virtual resource from other clouds. In order to minimize the DR cost at the same to guarantee the data protection, a novel cost aware high reliability provision algorithm (CAHRPA) is proposed to tackle such an optimization problem. The feasibility and efficiency of this method is verified by comparing with some other replication strategies.%　　文章提出了一种“富云”的数据容灾模型,即通过在云提供商之间相互进行数据备份和容灾,从而节省构建远程容灾中心的成本,并在此基础上设计了一种成本相关的云计算服务高可靠性保证算法CAHRPA,其根据数据恢复时间和容灾费用选择合适的容灾方案。实验结果证明,CAHRPA能够在满足数据恢复时间的同时选取一种成本最优的数据备份策略。