Essentially, a cache server is a heavy-duty network file server.

高速缓存服务器本质上是一种重型网络文件服务器。

youdao

In one, the client sits on a server of its own and commands a network file server to back up to a locally attached storage device.

其中一个就是，客户位于自己的服务器上，并命令网络文件服务器备份到本地连接的存储设备。

youdao

After some investigation, the problem appeared to be in the Linux network file system (NFS) kernel, the piece of the operating system responsible for some basic server functions.

CNN: Linux gaining with mission-critical systems