nfsstat --help
Usage: nfsstat [OPTION]...
-m, --mounts Show statistics on mounted NFS filesystems
-c, --client Show NFS client statistics
-s, --server Show NFS server statistics
-2 Show NFS version 2 statistics
-3 Show NFS version 3 statistics
-4 Show NFS version 4 statistics
-o [facility] Show statistics on particular facilities.
nfs NFS protocol information
rpc General RPC information
net Network layer statistics
fh Usage information on the server's file handle cache
rc Usage information on the server's request reply cache
all Select all of the above
-v, --verbose, --all Same as '-o all'
-r, --rpc Show RPC statistics
-n, --nfs Show NFS statistics
-Z[#], --sleep[=#] Collects stats until interrupted.
Cumulative stats are then printed
If # is provided, stats will be output every
# seconds.
-S, --since file Shows difference between current stats and those in 'file'
-l, --list Prints stats in list format
--version Show program version
--help What you just did
# nfsstat --version
nfsstat: 1.3.0
# nfsstat -s
Server rpc stats:
calls badcalls badclnt badauth xdrcall
754789 0 0 0 0
Server nfs v3:
null getattr setattr lookup access readlink
2 20% 3 30% 0 0% 0 0% 0 0% 0 0%
read write create mkdir symlink mknod
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
remove rmdir rename link readdir readdirplus
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
fsstat fsinfo pathconf commit
2 20% 2 20% 1 10% 0 0%
Server nfs v4:
null compound
4 0% 754774 99%
Server nfs v4 operations:
op0-unused op1-unused op2-future access close commit
0 0% 0 0% 0 0% 13342 0% 5568 0% 66 0%
create delegpurge delegreturn getattr getfh link
288 0% 0 0% 2130 0% 645096 31% 7113 0% 0 0%
lock lockt locku lookup lookup_root nverify
0 0% 0 0% 0 0% 1676 0% 0 0% 0 0%
open openattr open_conf open_dgrd putfh putpubfh
5879 0% 0 0% 151 0% 0 0% 653661 31% 0 0%
putrootfh read readdir readlink remove rename
11 0% 5093 0% 411 0% 0 0% 160 0% 4 0%
renew restorefh savefh secinfo setattr setcltid
101070 4% 0 0% 4 0% 0 0% 112 0% 2 0%
setcltidconf verify write rellockowner bc_ctl bind_conn
2 0% 0 0% 2504 0% 0 0% 0 0% 0 0%
exchange_id create_ses destroy_ses free_stateid getdirdeleg getdevinfo
6 0% 8 0% 3 0% 0 0% 0 0% 0 0%
getdevlist layoutcommit layoutget layoutreturn secinfononam sequence
0 0% 0 0% 0 0% 0 0% 2 0% 622017 30%
set_ssv test_stateid want_deleg destroy_clid reclaim_comp
0 0% 0 0% 0 0% 1 0% 5 0%
# nfsstat -4
Server rpc stats:
calls badcalls badclnt badauth xdrcall
754803 0 0 0 0
Server nfs v4:
null compound
4 0% 754788 99%
Server nfs v4 operations:
op0-unused op1-unused op2-future access close commit
0 0% 0 0% 0 0% 13342 0% 5568 0% 66 0%
create delegpurge delegreturn getattr getfh link
288 0% 0 0% 2130 0% 645108 31% 7113 0% 0 0%
lock lockt locku lookup lookup_root nverify
0 0% 0 0% 0 0% 1676 0% 0 0% 0 0%
open openattr open_conf open_dgrd putfh putpubfh
5879 0% 0 0% 151 0% 0 0% 653673 31% 0 0%
putrootfh read readdir readlink remove rename
11 0% 5093 0% 411 0% 0 0% 160 0% 4 0%
renew restorefh savefh secinfo setattr setcltid
101072 4% 0 0% 4 0% 0 0% 112 0% 2 0%
setcltidconf verify write rellockowner bc_ctl bind_conn
2 0% 0 0% 2504 0% 0 0% 0 0% 0 0%
exchange_id create_ses destroy_ses free_stateid getdirdeleg getdevinfo
6 0% 8 0% 3 0% 0 0% 0 0% 0 0%
getdevlist layoutcommit layoutget layoutreturn secinfononam sequence
0 0% 0 0% 0 0% 0 0% 2 0% 622029 30%
set_ssv test_stateid want_deleg destroy_clid reclaim_comp
0 0% 0 0% 0 0% 1 0% 5 0%
可以看出：
Server nfs v4
的确，NFS服务器版本是4
【总结】
1.NFS的客户端中：nfsstat -m
中的vers=4.0确定NFS版本是4。
2.NFS服务器中：nfsstat -s
中的Server nfs v4确定NFS版本的确是4
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