使用聚集I/O传输的方法提高网络存储系统的性能

网络存储技术为存储系统提供了更高的扩展性、可用性以及更好的灵活性，并且已经广泛应用到各种领域．但小I／O严重影响网络存储系统的性能，现有的一些方法缺少理论模型．通过排队理论建立聚集I／O传输的数学模型，然后在典型的IP网络存储(NAS)系统中，分别在NAS存储设备和客户两端设计了聚集模块，称之为CFS(chunk file system)，实现双向聚集I／O．最后对CFS进行了实验，结果和理论分析基本吻合，说明聚集I／O传输能够改善网络存储整体性能．

Applying Aggregate I/O to Improve Performance of Network Storage

Network storage provide high scalability, availability and flexible for storage systems, and are widely applied to many fields. Small I?O seriously affects the performance of the storage system including network storage. Current several methods want a theory model and only improve write performance. In this paper, the aggregate I?O model is presented first. Moreover, how to apply this methodology in a NAS system is also illustrated based on IP network. The aggregate I?O module called CFS (chunk file system) is designed at both the NAS device and the customer end. In the experiment, the analysis of the results shows correctness of the model and an improvement made by aggregate I?O for network storage performance.