融合容错需求和资源约束的云容错服务适配方法

Cloud Fault Tolerance Services Adaption Method Based on Requirement and Resource Constriction

云计算环境下,失效成为一种常态行为,可靠性保障能力不足不仅成为云计算应用推广的主要障碍,而且还促使云计算环境下的容错服务研究成为一个亟待解决的问题。针对目前云计算容错服务研究中存在的用户容错需求定义无法直接反映用户关心的可靠性问题,以及云容错服务供应商资源得不到灵活利用等问题,提出了一种融合容错需求和资源约束的云容错服务适配方法。从用户的角度,以组件为单位,基于可靠性对用户的容错需求进行定义。从云容错服务供应商的角度,分别在其资源充足和资源不足的情况下研究最佳的容错服务适配方法,并使用最优化理论求解该适配方法下的容错服务。实验结果表明,所提出的容错服务适配方法生成的容错服务能更好地满足用户和云容错服务供应商的需求。

In the environment of cloud computing,faults have become a normal behavior and the shortage of reliability safeguard not only has become the main obstacle of application promotions in cloud computing,but also has made fault tolerance services in cloud computing become a problem that need to be solved urgently.Aiming at solving the shortage study of fault tolerance services in cloud computing that the definition of user fault tolerance requirements can’t reflect reliability which was concerned by the users directly and the inflexible usage of the resources of cloud fault tolerance service providers,this paper proposed an adaption method of cloud fault tolerance services which was based on user requirement and resource constriction.This paper first defined the fault tolerance requirements of users from the prospective of users,which was conducted by taking a component as a unit and reliability as a basis.Then the optimal adaption method of fault tolerance services was studied from the perspective of cloud fault tolerance services providers under the condition of that the resources of fault tolerance service providers is insufficient or sufficient.This paper solved the fault tolerance services generated by the optimal adaption method using optimization theory.The results of the experiments showed that the fault tolerance services which were generated by our adaption method can better satisfy the requirements of users and cloud fault tolerance service providers.