基于网络存储的异构集群文件系统研究与实现

分析了存储区域网络环境下多平台文件共享所面临的主要问题及解决途径，提出了一个基于网络存储的开放系统与大型机集群文件系统，该系统采用第三方数据传送和大型机文件系统模拟的方法，解决了开放系统的字节流型文件系统与大型机的记录型文件系统的互操作问题，进而利用一些I／O性能优化策略实现了一个高性能的用户态运行库(Runtime Library)，使得开放系统上的应用程序利用该运行库可以实现对网络存储上大型机文件的高速访问。实验结果表明，与传统的客户／服务器文件共享模式相比，该系统具有更高的性能。

A High-Speed Heterogeneous Cluster File System for Network-Attached Storage

We contracted to develop a heterogeneous cluster file system based on network-attached storage, aiming at a file sharing system among open systems (Unix, Linux and Windows) and mainframe whose speed can approach more or less the ideal speed of local file system. In this paper, we explain in much detail how we developed our high-speed heterogeneous cluster file system. Here we give only a briefing of our explanation. By the method of third-party data transfer, open system can obtain file metadata from mainframe and access record file of mainframe on shared storage directly. We implement a user-level I/O library to emulate mainframe file system on open system. The library provides mainframe-style file system interfaces for applications on open system to access mainframe record files. Some optimized strategies for sequential file access are employed in this library. Our experimental results show preliminarily that, as compared with the file access model of client/server using server-attached storage, our system can make the speed higher by one order of magnitude or better.