topic Re: NFS mount options in Operating System - HP-UX

NFS mount options

Mihails Nikitins — Thu, 22 Dec 2005 06:17:48 GMT

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

Re: NFS mount options

RAC_1 — Thu, 22 Dec 2005 06:23:09 GMT

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.

Re: NFS mount options

Rainer von Bongartz — Thu, 22 Dec 2005 06:26:12 GMT

mount -p should show you the NFS mount parameters

Regards
Rainer

Re: NFS mount options

Arunvijai_4 — Thu, 22 Dec 2005 06:30:37 GMT

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

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

-Arun

Re: NFS mount options

Mihails Nikitins — Thu, 22 Dec 2005 06:40:04 GMT

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

Re: NFS mount options

Sameer_Nirmal — Thu, 22 Dec 2005 10:33:33 GMT

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.

Re: NFS mount options

Dave Olker — Thu, 22 Dec 2005 10:48:10 GMT

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

Re: NFS mount options

Mihails Nikitins — Thu, 22 Dec 2005 13:28:13 GMT

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.

Re: NFS mount options

Dave Olker — Thu, 22 Dec 2005 13:35:13 GMT

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