[Linux-cluster] Files are there, but not.

[Wendy Cheng]

Jaap Dijkshoorn wrote:

>Hi All,
>
>We are running a GFS / NFS cluster with 5 fileservers. Each server
>exports the same storage as a different NFS server. nfs1, nfs2....nfs5
>
>On nodes that mount on nfs1 we have the following problem:
>
>root# ls -l
>ls: CHGCAR: No such file or directory
>ls: CHG: No such file or directory
>ls: WAVECAR: No such file or directory
>total 17616
>-rw-------  1 xxxxxxxx yyy    1612 Sep 26 15:43 CONTCAR
>-rw-------  1 xxxxxxxx yyy    167 Sep 26 14:11 DOSCAR
>
>Other fileservers display the 3 missing files normally and they are
>accessible. On the fileservers we also get these kind messages:
>  
>
Look like NFS client side caching issue. What's the kernel version you 
have in the nfs client machine (do a "uname  -a")?

-- Wendy

>h_update: A.TCNQ/CHGCAR already up-to-date!
>fh_update: A.TCNQ/CHGCAR already up-to-date!
>fh_update: A.TCNQ/CHGCAR already up-to-date!
>fh_update: A.TCNQ/CHGCAR already up-to-date!
>fh_update: A.TCNQ/WAVECAR already up-to-date!
>fh_update: A.TCNQ/WAVECAR already up-to-date!
>fh_update: A.TCNQ/WAVECAR already up-to-date!
>fh_update: A+B/CHGCAR already up-to-date!
>fh_update: A+B/CHGCAR already up-to-date!
>fh_update: A+B/CHGCAR already up-to-date!
>fh_update: A+B/WAVECAR already up-to-date!
>
>I don't know where to start looking to trac this problem. If i reboot
>the nfs1 server the problem is gone, but in time the problem comes back
>with other files, until now on the same fileserver.
>
>Maybe someone has seen this problem before?
>
>We use GFS version CVS 1.0.3 stable. with kernel 2.6.17.11
>
>
>
>
>Met vriendelijke groet, Kind Regards,
>
>Jaap P. Dijkshoorn
>Systems Programmer
>mailto:jaap at sara.nl    http://home.sara.nl/~jaapd
>
>SARA Computing & Networking Services
>Kruislaan 415     1098 SJ  Amsterdam
>Tel: +31-(0)20-5923000
>Fax: +31-(0)20-6683167
>http://www.sara.nl
>
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>  
>


-- 
S. Wendy Cheng
wcheng at redhat.com