[Samba] Files on samba share not updated quickly enough

[Günter Kukkukk]

Am Dienstag, 17. März 2009 schrieb as:
> Re: [Samba] Files on samba share not updated quickly enough
> Von: 
> as <rmctodd at gmail.com>
>   An: 
> Volker.Lendecke at sernet.de
>   Kopie: 
> samba at lists.samba.org
>   Datum: 
> Gestern 21:31:19
>    
>   Spam-Status: Spamassassin Mit 0% iger Wahrscheinlichkeit Spam.
> 
> Ausführlicher Bericht:
> No, score=-3.6 required=3.8 tests=BAYES_00,DNS_FROM_RFC_POST, SPF_PASS autolearn=no version=3.1.7  
> > Have you tried "oplocks = no"?
> >
> >
> >  Volker
> >
> 
> Yes. I tried with oplocks = no option. There is no change in the
> status. I am using this script to update the latest.txt file and I've
> attached the corresponding output.
> 
> while [[ 1 ]]; do date +%H:%M:%S:%N > latest.txt; date +%H:%M:%S:%N ;
> sleep 0.07s; done
> 
> 13:11:14:513173232
> 13:11:14:588513935
> 13:11:14:663778637
> 13:11:14:739044080
> 13:11:14:814301658
> 13:11:14:889642454
> 13:11:14:964972251
> 13:11:15:040227305
> 13:11:15:115474815
> 
> The corresponding script and output on the client side is
> 
> while [[ 1 ]]; do echo `date +%H:%M:%S:%N`: `cat
> /mnt/gnode1/latest.txt` ; sleep 0.1s; done
> 
> 13:11:16:203937190: 13:11:13:005819552
> 13:11:16:310620831: 13:11:13:005819552
> 13:11:16:417328506: 13:11:14:135155742
> 13:11:16:524336505: 13:11:14:135155742
> 13:11:16:631038219: 13:11:14:135155742
> 13:11:16:737723614: 13:11:14:135155742
> 13:11:16:844418840: 13:11:14:135155742
> 13:11:16:951090321: 13:11:14:135155742
> 13:11:17:057833620: 13:11:14:135155742
> 13:11:17:164582597: 13:11:14:135155742
> 13:11:17:271157849: 13:11:14:135155742
> 13:11:17:377872676: 13:11:15:038496125
> 13:11:17:484839236: 13:11:15:038496125
> 13:11:17:591585854: 13:11:15:038496125
> 13:11:17:698156931: 13:11:15:038496125
> 13:11:17:804788559: 13:11:15:038496125
> -- 
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Cause you're saying that both the server and the client are running
Linux, I assume you're using cifs vfs on the client side to mount
the remote share.
Note that also the cifs client is doing inode data caching.
You can disable this by using the mount option "directio".

Be aware of the side-effects - see 'man mount.cifs' for
further details, also available online:
http://us6.samba.org/samba/docs/man/manpages-3/mount.cifs.8.html

Cheers, Günter