摘要： NFS是集群系统中提供全局文件共享的主要手段，研究影响NFS带宽的因素对于优化集群系统的性能十分重要。该文针对集群系统中I/O特征建立了NFS的带宽模型，设计和实现了基于MPI开发的并行文件系统测试工具Mpbonnie，在集群系统中测试和分析了多种因素对NFS性能的影响。结果表明，除已知的存储和网络因素外，与NFS带宽关系密切的因素还包括客户端数量、服务器文件系统类型、读写方式和服务器处理能力等。

关键词: NFS, 带宽, 性能分析

Abstract: NFS is a predominant distributed file system in the cluster. Besides network bandwidth and storage bandwidth, there are some other factors affecting NFS bandwidth as well. With a new MPI-based parallel I/O benchmark Mpbonnie, this paper measures and analyses NFS performance with different configurations in the cluster. It proves server side file system, I/O mode and server side processor have great impact on NFS performance.

Key words: NFS, bandwidth, performance analysis

中图分类号: 

• TP393