高性能集群文件系统的研究

集群系统提供了强大的批处理和并行计算的能力，具有高性能、高可扩展性、高吞吐量和易用性等特点，但是I／O性能和处理器性能的不匹配使得I／O成为许多应用的瓶颈，特别是处理大量数据的应用就更是如此。针对集群系统当前的现状，克服该瓶颈的常用方法就是采用一种并行虚拟文件系统（PVFS）技术。随着Linux群集系统性能的持续提高，高速并行文件已成为并行计算的一个必备部分。并行虚拟文件系统（PVFS）为高性能计算（HPC）群集和大型I／O密集并行应用提供了这样一个文件系统。首先介绍了PVFS的结构；然后研究了PVFS的存取和管理机制；最后分析，PVFS的工作原理。

Research of file system based on high performance cluster

In recent years the disparity between I/O performance and processor performance has led to I/O bottlenecks in many applica-tions,especially those using large data sets.A popular approach for alleviating this kind of bottleneck is the use of parallel file systems.The goal of the parallel virtual file system(PVFS) Project is to explore the design,the implementation,and uses of parallel I/O.First,the PVFS structure is introduced.Then,the PVFS access and administration mechanism are researched.Finally,the PVFS rationale is analyzed.