GlusterFS is a userspace filesystem. This was a decision made by the GlusterFS developers initially as getting the modules into linux kernel is a very long and difficult process.
GlusterFS是一个用户空间文件系统。FUSE最初由GlusterFS的开发商经过了非常漫长和艰难的决策过程才成功地将获取模块集成到Linux内核中。
Being a userspace filesystem, to interact with kernel VFS, GlusterFS makes use of FUSE (File System in Userspace). For a long time, implementation of a userspace filesystem was considered impossible.
GlusterFS充分利用FUSE（File System in Userspace）与内核虚拟文件系统交互。长期以来，实现用户空间文件系统被认为是不可能的。
FUSE was developed as a solution for this. FUSE is a kernel module that support interaction between kernel VFS and non-privileged user applications and it has an API that can be accessed from userspace.
开发FUSE就是为了解决此问题，FUSE是一个内核模块，它支持内核VFS和非特权用户应用程序之间的交互和从用户空间访问应用程序的API
