云存储系统中基于分簇的数据复制策略

A cluster based data replication strategy in cloud storage systems

云存储技术已经成为当前互联网中共享存储和数据服务的基础技术,云存储系统普遍利用数据复制来提高数据可用性,增强系统容错能力和改善系统性能。提出了一种云存储系统中基于分簇的数据复制策略,该策略包括产生数据复制的时机判断、复制副本数量的决定以及如何放置复制所产生的数据副本。在放置数据副本时,设计了一种基于分簇的负载均衡副本放置方法。相关的仿真实验表明,提出的基于分簇的负载均衡副本放置方法是可行的,并且具有良好的性能。

Currently, cloud storage becomes one of the fundamental technologies for information sha- ring and data service in the Internet. Data replication is widely used in cloud storage systems to improve the data availability, enhance the fault-tolerant capability and ameliorate improve the system perform- anee. A cluster-based data replication strategy in cloud storage systems is proposed, which includes when to replicate data, the number of its replicas and where these replicas should be placed. In the repli- ca placement stage, a Cluster Based Replication Placement （CBRP） method with load balance in cloud storage systems is proposed. Experiments demonstrate that the proposed method is practical and with good performance.