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Update the man page to reflect the addition of NFSv4.2 (r355677).

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Update all the references to NFSv4.1, so that they apply to NFSv4.1 and
NFSv4.2. Also, change the MDS->DS mounts to use NFSv4.2, so that both
versions of the protocol can be used against the server with pNFS enabled.

This is a content change.
This commit is contained in:
Rick Macklem 2019-12-20 21:45:20 +00:00
parent 2ec2bb18aa
commit 9449898858
1 changed files with 26 additions and 15 deletions
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41
usr.sbin/nfsd/pnfsserver.4
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@ -23,12 +23,12 @@
.\"
.\" $FreeBSD$
.\"
.Dd August 8, 2018
.Dd December 20, 2019
.Dt PNFSSERVER 4
.Os
.Sh NAME
.Nm pNFSserver
.Nd NFS Version 4.1 Parallel NFS Protocol Server
.Nd NFS Version 4.1 and 4.2 Parallel NFS Protocol Server
.Sh DESCRIPTION
A set of FreeBSD servers may be configured to provide a
.Xr pnfs 4
@ -37,13 +37,23 @@ One FreeBSD system needs to be configured as a MetaData Server (MDS) and
at least one additional FreeBSD system needs to be configured as one or
more Data Servers (DS)s.
.Pp
These FreeBSD systems are configured to be NFSv4.1 servers, see
These FreeBSD systems are configured to be NFSv4.1 and NFSv4.2
servers, see
.Xr nfsd 8
and
.Xr exports 5
if you are not familiar with configuring a NFSv4.1 server.
if you are not familiar with configuring a NFSv4.n server.
All DS(s) and the MDS should support NFSv4.2 as well as NFSv4.1.
Mixing an MDS that supports NFSv4.2 with any DS(s) that do not support
NFSv4.2 will not work correctly.
As such, all DS(s) must be upgraded from
.Fx 12
to
.Fx 13
before upgrading the MDS.
.Sh DS server configuration
The DS(s) need to be configured as NFSv4.1 server(s), with a top level exported
The DS(s) need to be configured as NFSv4.1 and NFSv4.2 server(s),
with a top level exported
directory used for storage of data files.
This directory must be owned by
.Dq root
@ -89,8 +99,8 @@ DS system.
.Sh MDS server configuration
The MDS must be a separate FreeBSD system from the FreeBSD DS system(s) and
NFS clients.
It is configured as a NFSv4.1 server with file system(s) exported to
clients.
It is configured as a NFSv4.1 and NFSv4.2 server with
file system(s) exported to clients.
However, the
.Dq -p
command line argument for
@ -99,7 +109,7 @@ is used to indicate that it is running as the MDS for a pNFS server.
.Pp
The DS(s) must all be mounted on the MDS using the following mount options:
.Bd -literal -offset indent
nfsv4,minorversion=1,soft,retrans=2
nfsv4,minorversion=2,soft,retrans=2
.Ed
.sp
so that they can be defined as DSs in the
@ -112,10 +122,10 @@ For example, if there are four DSs named nfsv4-data[0-3], the
.Xr fstab 5
lines might look like:
.Bd -literal -offset
nfsv4-data0:/ /data0 nfs rw,nfsv4,minorversion=1,soft,retrans=2 0 0
nfsv4-data1:/ /data1 nfs rw,nfsv4,minorversion=1,soft,retrans=2 0 0
nfsv4-data2:/ /data2 nfs rw,nfsv4,minorversion=1,soft,retrans=2 0 0
nfsv4-data3:/ /data3 nfs rw,nfsv4,minorversion=1,soft,retrans=2 0 0
nfsv4-data0:/ /data0 nfs rw,nfsv4,minorversion=2,soft,retrans=2 0 0
nfsv4-data1:/ /data1 nfs rw,nfsv4,minorversion=2,soft,retrans=2 0 0
nfsv4-data2:/ /data2 nfs rw,nfsv4,minorversion=2,soft,retrans=2 0 0
nfsv4-data3:/ /data3 nfs rw,nfsv4,minorversion=2,soft,retrans=2 0 0
.Ed
.sp
The
@ -201,7 +211,8 @@ For a service that will store a large number of files this sysctl should be
set much larger, to avoid the number of entries in a subdirectory from
getting too large.
.Sh Client mounts
Once operational, NFSv4.1 FreeBSD client mounts done with the
Once operational, NFSv4.1 or NFSv4.2 FreeBSD client mounts
done with the
.Dq pnfs
option should do I/O directly on the DSs.
The clients mounting the MDS must be running the
@ -325,7 +336,7 @@ directory for storage of data files just like it did when first set up.
Mount it on the MDS exactly as you did before disabling it.
For the nfsv4-data3 example, the command would be:
.Bd -literal -offset
# mount -t nfs -o nfsv4,minorversion=1,soft,retrans=2 nfsv4-data3:/ /data3
# mount -t nfs -o nfsv4,minorversion=2,soft,retrans=2 nfsv4-data3:/ /data3
.Ed
.sp
Then restart the nfsd to re-enable the DS.
@ -403,7 +414,7 @@ http://people.freebsd.org/~rmacklem/pnfs-planb-setup.txt
.Sh HISTORY
The
.Nm
command first appeared in
service first appeared in
.Fx 12.0 .
.Sh BUGS
Since the MDS cannot be mirrored, it is a single point of failure just