一种基于VirtFS的共享文件空间技术

由于虚拟环境多次I/O操作模拟的存在,运行在宿主服务器中的各虚拟客户机之间使用传统代理进行文件访问效率不高。为此,提出了基于VirtFS的共享文件空间技术。构建了虚拟客户机共享文件空间的系统架构,设计了虚拟磁盘操作映射机制,使用VirtFS框架提供的系统层接口,在宿主服务器中的VirtFS服务端截取和映射文件操作,直接将虚拟机文件系统的操作映射为对宿主服务器文件系统的操作。为了保障安全,彻底隔离用户域,实现分组共享。实验结果表明,采用该方法比现有代理方法文件读写效率分别提高9.7和5.7倍。

A Space Technology VirtFS-based Shared File

Because of the existence of multiple I/O operation simulation in the virtual environment,it is not efficient to use traditional proxy to access files between virtual clients running in the host server.For this problem,a VirtFS-based Shared file space technology is proposed.The system archi-tecture of virtual client sharing file space is constructed,and the mapping mechanism of virtual disk operation is designed.Using the system layer interface provided by the VirtFS framework,the VirtFS server intercepts and maps file operations in the host server,and directly maps the operations of the virtual machine file system to those of the host server file system.At the same time,in order to ensure security,completely isolated user domain,to achieve group sharing.The experimental results show that this method can improve the file reading and writing efficiency by 9.7 and 5.7 times respectively.