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+.\" Copyright (c) 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" This document is derived from software contributed to Berkeley by
+.\" Rick Macklem at The University of Guelph.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.(l C
+.sz 14
+.b "The 4.4BSD NFS Implementation"
+.sp
+.sz 10
+Rick Macklem
+.i "University of Guelph"
+.)l
+.sp 2
+.ce 1
+.sz 12
+.b "ABSTRACT"
+.eh 'SMM:06-%''The 4.4BSD NFS Implementation'
+.oh 'The 4.4BSD NFS Implementation''SMM:06-%'
+.pp
+The 4.4BSD implementation of the Network File System (NFS)\** is
+intended to interoperate with
+.(f
+\**Network File System (NFS) is believed to be a registered trademark of
+Sun Microsystems Inc.
+.)f
+other NFS Version 2 Protocol (RFC1094) implementations but also
+allows use of an alternate protocol that is hoped to provide better
+performance in certain environments.
+This paper will informally discuss these various protocol features and
+their use.
+There is a brief overview of the implementation followed
+by several sections on various problem areas related to NFS
+and some hints on how to deal with them.
+.pp
+Not Quite NFS (NQNFS) is an NFS like protocol designed to maintain full cache
+consistency between clients in a crash tolerant manner. It is an adaptation
+of the NFS protocol such that the server supports both NFS
+and NQNFS clients while maintaining full consistency between the server and
+NQNFS clients.
+It borrows heavily from work done on Spritely-NFS [Srinivasan89], but uses
+Leases [Gray89] to avoid the need to recover server state information
+after a crash.
+.sp