 | | | NFS - how to tell the mount options | NFS - how to tell the mount options 2004-03-31 - By Rick Stevens
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Waldher, Travis R wrote:
> >-- --Original Message-- --
> >From: Rick Stevens [mailto:rstevens@(protected)]
> >Sent: Wednesday, March 31, 2004 10:38 AM
> >To: Getting started with Red Hat Linux
> >Subject: Re: NFS - how to tell the mount options
> >
> >
> >Waldher, Travis R wrote:
> >
> > >I forgot where it was...
> > >
> > >Where is the file that tells me what a NFS mount used as far as
> > >options
> > >goes? nfsv2 vs v3, cache settings, etc.?
> >
> > "man nfs " will give you the available options. As far as
> >where you specify them at mount time, that 's in /etc/fstab.
> >
> >
> > >If I don 't manually set how I want it to mount, I don 't know how to
> > >tell
> > >how it did mount.
> >
> > "mount " alone should show you which non-default options were
> >actually used. Those not displayed use the defaults shown in
> > "man nfs ":
> >
> > [root@(protected) bin]# mount -l -t nfs
> > netapp2:/VIRTMAIL on /virtmail type nfs
> > (rw,tcp,hard,noac,rsize=8192,wsize=8192,
> > nfsvers=3,addr=10.24.1.4)
> >
> >The stuff not displayed use the defaults. The corresponding
> >line in /etc/fstab (wrapped for easier reading) is:
> >
> > netapp2:/VIRTMAIL /virtmail nfs \
> > rw,tcp,hard,noac,rsize=8192,wsize=8192,nfsvers=3
> >
> >Ok?
>
>
> Well... Here 's the riddle.
>
> How can I tell which version of nfs is being used. The default
> according to the nfs man page is version 2. I didn 't specifically say
> use nfsvers2 or 3, so it should have used 2.
>
> Then why are my nfs v3 nfs counters going up when I transfer data?
>
> Client nfs v3:
> null getattr setattr lookup access readlink
> 0 0% 31227016 5% 15363112 2% 19036511 3% 387690989 0% 228600
> 0%
> read write create mkdir symlink mknod
> 63 0% 76477074 6% 4455603 0% 102785 0% 1276273 0% 24 0%
> remove rmdir rename link readdir readdirplus
> 4114960 0% 168678 0% 10 0% 727 0% 103584 0% 0 0%
> fsstat fsinfo pathconf commit
> 1547 0% 1547 0% 0 0% 4621261 0%
>
> I have about 200 file systems mounted right now, many must be nfsv2,
> because that 's all the server supports, obviously others decided to
> mount up to nfsv3. BUT, how can I tell. None of the commands you gave
> me are telling me anything, and I never specified in the fstab file
> which version of nfs to use.
If "mount " does not explicitly tell you that it 's mounted as "nfsvers=3 "
then it 's V2. The stats show up in the V3 client data because your
_client_ is V3 (which is backwards-compatible with V2). I know, it 's
weird, but that 's how it goes.
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
- Rick Stevens, Senior Systems Engineer rstevens@(protected) -
- VitalStream, Inc.
http://www.vitalstream.com
-
- -
- Memory is the second thing to go, but I can 't remember the first! -
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
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