Files not visible across NFS

Files not visible across NFS

[Sai Bhushan]

Hi,

I am facing a problem where-in some files are not visible across NFS and 
hence, not able to read those files. However, after sometime, the files 
become visible and the data is accessible. I have tried to do an 'ls -l' 
operation on the directory and repeat it till the directory gets mounted 
and visible. This works in some cases but sometimes fails as well.

Is there any reliable way of ensuring that the directory gets mounted 
and all files in it are visible before accessing the data ??

Any help/pointers in this regard would be really great.

-Thanks & Regards
Sai

Re: Files not visible across NFS

[Alexander van Heukelum]

On Thu, 15 Mar 2007 16:51:02 +0530, "Sai Bhushan" <sbhushan@cadence.com>
said:
> Hi,
> 
> I am facing a problem where-in some files are not visible across NFS and 
> hence, not able to read those files. However, after sometime, the files 
> become visible and the data is accessible. I have tried to do an 'ls -l' 
> operation on the directory and repeat it till the directory gets mounted 
> and visible. This works in some cases but sometimes fails as well.
> 
> Is there any reliable way of ensuring that the directory gets mounted 
> and all files in it are visible before accessing the data ??
> 
> Any help/pointers in this regard would be really great.

Hi,

Many Ubuntu users seem to be experiencing such problems on ubuntu-2.6.17
kernels:

https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.17/+bug/62308

In my experience, everything works fine as long as all
directory-elements in 
the path on the nfs mount are set executable for user _and_others_. If
that
is not the case, files are available for about five seconds after the
first
access, after which they disappear. If I try to access the file again I
get 
a "permission denied" message. No messages get logged.

For me, adding the "no_subtree_check" option in /etc/exports 'fixed' the
problem. I'm on ubuntu-2.6.17-11-generic on amd64. This works for me:

/home    
192.168.22.0/255.255.255.0(rw,sync,no_subtree_check,mp=/home,fsid=12120)
/scratch 
192.168.22.0/255.255.255.0(rw,sync,no_subtree_check,mp=/scratch,fsid=12121)

Anyhow, you did not give any information about your
distro/kernel/hardware?

Greetings,
    Alexander

> -Thanks & Regards
> Sai
> 
> -
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-- 
  Alexander van Heukelum
  heukelum@fastmail.fm

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