摘要： 在Google开放云环境的基础上，分析云环境的网络拓扑结构和基于地理位置信息的各服务器位置关系，得到数据块集合在云环境下层次化网络拓扑结构中的分布图，通过研究数据块集合分布图，提出云环境中存储资源的风险评估模型，并给出具体的风险计算算法和实例分析，为在云环境中对基于存储资源的风险研究提供理论依据。

关键词: 云计算, 云存储, 可扩展性, 可靠性, 风险模型, 负载均衡

Abstract: On the basis of Google open cloud environment, through the analysis of network topology and location information based on the relationship between the server location in the cloud environment, this paper gets hierarchical network topology map of collection of data blocks in the cloud environment, and gets risk assessment model through the analysis of data block distribution to the storage resources in the cloud environment and gives specific examples of risk calculation algorithms and specific example analysis and provides a theoretical risk basis for cloud storage resources in the cloud environment.

Key words: cloud computing, cloud storage, scalability, reliability, risk model, load balancing

中图分类号: 

• TP311