The NFS version 4 (NFSv4) protocol provides a mechanism for a collection of NFS file servers to collaborate in providing an organization-wide file namespace. The DNS SRV Resource Record (RR) allows a simple way for an organization to publish the root of its file system namespace@ even to clients that might not be intimately associated with such an organization. The DNS SRV RR can be used to join these organization-wide file namespaces together to allow construction of a global@ uniform NFS file namespace.
RFC 6641-2012 history
2012RFC 6641-2012 Using DNS SRV to Specify a Global File Namespace with NFS Version 4