摘要： PVFS 并行文件系统采用集中式的元数据服务器，这使得元数据服务器在大量的文件操作情况下成为I/O 瓶颈。该文通过增强PVFS的客户端和元数据服务器的相关功能，使得客户的文件请求按照文件名的Hash 变换转向不同的元数据服务器，在保留原来的用户访问方式和系统配置不变的情况下实现元数据服务器的并行化，达到明显提高元数据服务器的总吞吐量和可扩展性。

关键词: 并行文件系统；PVFS；元数据服务器；并行化；可扩展

Abstract: The centralized meta server of PVFS is a potential performance bottle-neck under the heavy IO traffic. Using a modified libpvfs library, the IO request is redirected to different meta server according to the Hash number of requested filename, then improve the total throughput of meta service. The modified library is compatible to the original user interface and the configuration file format. It is a scalable method to improve the meta data IO throughput.

Key words: Parallel file system; PVFS; Meta server; Parallelization; Scalable