Network File System Version 4

Document Charter Network File System Version 4 WG (nfsv4)
Title Network File System Version 4
Last updated 2019-03-27
State Approved
WG State Active
IESG Responsible AD Magnus Westerlund
Charter Edit AD Magnus Westerlund
Send notices to (None)


Network File System version 4 (NFSv4) is the IETF standard for file 

To maintain NFS Version 4's utility and currency, the NFSv4 working 
group is chartered to maintain the existing NFSv4.0, NFSv4.1, and 
NFSv4.2 protocols and specifications of related ONC components, such as 
those defining RPC, XDR, and RPCSECGSS. 

In addition, extensions will be developed, as necessary, to correct 
problems with the protocols as currently specified, to accommodate 
needed file system semantics, and to respond to technological 
developments in the areas of networking and persistent storage/memory.


The working group's experience has been that, as NFSv4 implementations 
mature and deployments continue, clarifications and corrections to 
existing RFCs are needed. 

These specification updates help vendors in delivering high-quality and 
interoperable implementations. 

The NFSv4 working group is chartered with vetting reported issues and 
determining correctness of submitted errata. 

In addition, some areas may need more concentrated work to correct the 
specifications already published, to deal with unanticipated 
interactions between features, or to respond to evolving expectations 
with regard to areas such as security. Since necessary changes in such 
cases are generally not appropriate for the errata system, the working 
group will assist in publication of new RFCs that provide implementation 
guidance, editorial modification or technical updates to existing RFCs.  

Since the new NFSv4 versioning framework has been approved, these 
technical updates to NFSv4 minor versions could include limited XDR 


The NFSv4 protocol is designed to allow extension by the definition of 
new operations, new attributes, and new Parallel NFS layout types, as 
well as the creation of minor versions.  

Similarly, associated ONC protocol components that have a versioning/
extension framework can be incrementally extended, when necessary.

The working group will discuss proposals for such extensions and assure 
that they have adequate technical review, including discussion of their 
interaction with existing features, before adopting them as working 
group items and helping to draft specification documents. 

Some likely motivations for such extensions would be to:

Maximize NFS performance on advanced network fabrics.

Accommodate new storage technologies.

Provide facilities useful in management of NFS-accessed storage in 
large-scale virtualization environments.

Provide more effective NFS response to security challenges.

New milestones that fall within the scope specified in this charter can 
be added to the list below after working group consensus and upon 
approval by the responsible Area Director.