文件名称：NFS Illustrated by Brent Callaghan (z-lib.org).pdf
文件大小：15.48MB
文件格式：PDF
更新时间：2023-06-16 08:49:38
NFS, Linux, 存储，文
Preface I have been working with the NFS protocol since I joined Sun Microsystems in 1986. At that time the NFS market was expanding rapidly and I was excited to be working with the group, led by Bob Lyon, that developed the protocol and its first implementation in SunOS. In the NFS group, the protocol was a powerful but raw technology that needed to be exploited. We wanted it to run on as many platforms as possible, so an NFS porting group was assigned the task of helping other companies implement NFS on their computers. Our NFS evangelism was a little ahead of its time. Before the phrase “open systems” had yet become hackneyed, we’d made the source code for Sun RPC available for free download via FTP server1 and organized the first Connectathon event. At Connectathon our enthusiasm for NFS was shared with engineers from other companies who brought along their machines, source code, and junk food and spent a few days connected to a network, testing their NFS client and server implementations against each other. Implementations of the NFS protocol have been successful in bringing remote file access to programs through existing interfaces. There is no need to change the software for remote file access or to name files differently. NFS has been almost too successful at making remote files indistinguishable from local files. For instance, a program that backs up files on a local disk to tape needs to avoid stumbling into NFS filesystems. For everyone but system administrators, NFS is invisible—if you ignore the rare “NFS server not responding” message. It’s easy to forget NFS is there. NFS has no programming interface of its own. Even software engineers have no need to deal with NFS directly. There are no conference tutorials called “Programming with NFS,” there are no magazine screen shots of NFS-enabled applications, and there are no demonstrations of NFS at trade shows. Except for server administrators, NFS seems not to exist. There are many server implementations of the NFS protocol, each with its own features. Each of these server implementations has its own documentation, each slightly different. Perhaps this explains why there are so few NFS books available. NFS is never more than a chapter in a book about