Chapter 17. NFS Version 4

Just as NFS version 3 is gaining in popularity, the NFS protocol is being revised again: NFS version 4. Why so soon after version 3? What is wrong with version 3? How will another protocol revision improve NFS? This chapter will explain the rationale for version 4.

NFS version 3, defined in 1992, was a limited protocol revision. There had been several attempts in prior years to fix the limitations of NFS version 2, but in each case the accretion of features made the protocol too unwieldy to implement. Mac users wanted a file model that would handle a data and resource fork. VAX/VMS users wanted operations for record-oriented files. DOS users wanted case-insensitive directory lookups.

The team that designed version 3 ...

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