Préférez la version 4. Voir NFSv4

Voir :

• rclone serv

/etc/exports

/data/plop                  machine1(async,rw,no_root_squash)

exportfs -rv

Si besion

chmod 1777 /data/plop

/etc/fstab

serveurnfs:/data/plop         /import/plop          nfs     defaults,_netdev,nfsvers=3      0 0

rw,bg,hard,rsize=32768,wsize=32768,tcp,vers=3,timeo=600

mkdir -p /import/plop
mount /import/plop

Mount options

nocto: Suppress the retrieval of new attributes when creating a file.
noac: Disable all forms of attribute caching entirely. This extracts a significant performance penalty but it allows two different NFS clients to get reasonable results when both clients are actively writing to a common export on the server.
noacl: Disables Access Control List (ACL) processing.

vers=4.1: NFS v4.1 should be used instead of v4.0 because there is a Linux NFS client bug in v4.0 that can cause significant problems due to stale data.

nofail: Don't halt boot process waiting for this mount to become available

lookupcache=positive: Tells the NFS client to honor positive cache results but invalidates any negative cache results. Negative cache results cause problems with Git. Specifically, a git push can fail to register uniformly across all NFS clients. The negative cache causes the clients to 'remember' that the files did not exist previously.

Voir aussi :

• check_mk
• fsfreeze (Linux Ext3/4, ReiserFS, JFS, XFS)
• RedHat - Using nfsstat and nfsiostat to troubleshoot NFS performance issues on Linux

Le plus simple pour monitorer NFS étant de créer un fichier de le l'effacer https://docs.netapp.com/us-en/ontap/nfs-config/test-access-client-systems-task.html

stat -f (system call statfs(2)
If the NFS mount is “stale”, then stat -f returns immediately but with a size of -1. The check detects that and results in a warning state.

mount -l | grep nfs
grep nfs /proc/mounts
nfsstat
nfsstat --mounts
mountpoint -q /mnt/foo
findmnt -rno SOURCE,TARGET "$1"
lsof -b
ss -a|grep :nfs

mountpoint="/mnt/testnfs"
#read -t1 < <(stat -t "$mountpoint" 2>&-)
read -r -t1 < <(stat -t "$mountpoint" 2>&-)
if [ -z "$REPLY" ] ; then
  echo "NFS mount stale. Removing..."
fi