NFS mount options

[Mihails Nikitins]

Hi,

What are default NFS mount parameters in HP-UX 11.0? 11.0 just reports "defaults,NFSv3" and work much faster.

/etc/fstab
:/path /mnt/point nfs rw 0 0

HP-UX 11.0 mount output
defaults,NFSv3 on Thu Dec 22 12:34:05 2005

HP-UX 11.23 mount output

rsize=32768,wsize=32768,NFSv3,dev=62000000

Thanks and points advance!

BR,
Mihails

[RAC_1]

Do not any specific defaults, but you can see default options when you mount nfs mount without any ecific options.

Once you do mount, do mount -v or mount -p to know what are default options a file system has been mounted with.

[Rainer von Bongartz]

mount -p should show you the NFS mount parameters

Regards
Rainer

[Arunvijai_4]

http://docs.hp.com/en/5991-1153/index.html

[NFS Services Administrator's Guide: HP-UX 11.0]

-Arun

[Mihails Nikitins]

Sorry RAC,

I'd like to find out what are real values of 'defaults,NFSv3' in HP-UX 11.0.

I'd like configure the same parameters on myHP-UX 11.23 system.

11.0: > mount -p

1.2.3.4:/share/aa/bb /mnt/zzz nfs defaults,NFSv3 0 0

[Sameer_Nirmal]

Hi,

The mount command shows "defaults" which signifies the default options are used for mounting the nfs. You can get information about those default options in the man page of mount_nfs(1M) on HP-UX 111.00

You can refer the man page of mount_nfs(1M) on HP-UX 11.23 to know the mount options which are equivalent to 11.00.
There are new options added on 11.23 for nfs.

[Dave Olker · Accepted solution]

Hi Mihails,

You can use the "nfsstat -m" command to get the real mount options of any NFS-mounted filesystem.

The default mount options on 11.0 depend upon whether you've installed any ONC patches and enabled NFS/TCP support. If you have then the defaults are:

PV3, TCP, rsize/wsize=8K, hard

If you haven't enabled TCP the defaults are:

PV3, UDP, rsize/wsize=8K, hard

Again, "nfsstat -m" will tell you what options you're using on a per-mount basis.

Regards,

Dave

[Mihails Nikitins]

Thanks for the replies!

I've found the solution. If rsize,wsize parameters are not specified, HP-UX takes 32768. It's too big. I specified "ro,rsize=8192,wsize=8192" in /etc/fstab, and now it works well. If you choose 8192, mount -p say "defaults". If you do not specify rsize, wsize 32768 is used as real default. It's mesleading.

[Dave Olker]

Hi Mihails,

HP-UX 11.0 does not use 32768 as the default read/write size. It uses 8K. HP-UX releases after 11.0 (11.11 and 11.23) do use 32768 as the default but 11.0 still uses 8K as the default read/write size if you don't specify.

Here is an example:

# uname -a
HP-UX emonster B.11.00 A 9000/785 2010714527 two-user license
# mount atcux12:/va-1 /nfs_mount
# nfsstat -m
/nfs_mount from atcux12:/va-1 (Addr 15.43.209.141)
Flags: vers=3,proto=udp,auth=unix,hard,intr,link,symlink,devs,rsize=8192,wsize=8192,retrans=5
All: srtt= 0 ( 0ms), dev= 0 ( 0ms), cur= 0 ( 0ms)


As you can see, HP-UX 11.0 uses UDP/PV3/8K by default unless you enable TCP support, at which time TCP becomes the default.

Regards,

Dave