PVFS客户端目录缓存设计与实现

Design and Implementation of Client’s Directory Caching for PVFS

缓存技术是提高并行文件系统性能的关键性技术。在并行文件系统中实现客户端目录缓存,不仅可以减轻目录服务器的压力,避免目录服务器成为系统瓶颈,而且可以简化客户端操作过程,提高并行文件系统的性能。该文对PVFS并行文件系统进行了分析,建立了客户端目录缓存模型;就客户端目录缓存实现的一些关键性问题,如缓存池开辟位置、一致性等问题进行了研究,给出了解决方法,并在此基础上实现了一个客户端目录缓存的原型系统。测试结果表明,加入缓存后,PVFS系统性能有所提高。

Caching is the key technology that can improve the performance of the parallel file system. The implementation of client＇s directory caching not only reduces the directory server＇s burden, but also simplifies the operation process and improves the performance of parallel file system. This paper proposes a client＇s directory caching model by analyzing PVFS structure. Then, it does some research in the key issues on client＇s directory caching, such as the location of caching, consistency and so on. By analysing,it presents the solutions concretely and further more, implements a prototype system of client＇s directory caching. The testing results demonstrate that using directory caching can improve the performance of PVFS.