[Samba] Files on samba share not updated quickly enough
Hello: I have set up a samba share between 2 linux machines, where the server updates a file (latest.txt, 200bytes) at 15 Hz. My problem is that the client does not get the latest version of this file latest.txt when it reads this file every 100ms or so. It seems to be updating the file once a second. For instance, when I check for the contents of the file latest.txt every 100ms, the same contents are printed for 10 checks although the actual file has changed almost every time I check it. It seems to be a cache problem (I really don't need cache - I would like to turn it off if it is not a problem, but I don't know how to do it. Any help will be appreciated. My machine configuration is Linux Ubuntu 8.04 with samba 3.0.28a. The smb.conf file is as follows. [global] workgroup = SENTIENT interfaces = xx.xx.xx.xx hosts allow = ALL encrypt passwords = true [ramdisk] path = /fs/ram0 public = yes valid users = sentient read only = yes create mask = 0444 directory mask = 0444 My priority is to share some data (15-30MB) from one machine so that it is readable from one other machine. The data is read-only and only one machine is going to access this share at a time. I am not even sure if samba is the best (I tried NFS but it also has similar problems). I would be grateful if anybody with experience can suggest alternatives. Thanks, Aravind. -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
Re: [Samba] Files on samba share not updated quickly enough
On Tue, Mar 17, 2009 at 11:46:37AM -0700, as wrote: I have set up a samba share between 2 linux machines, where the server updates a file (latest.txt, 200bytes) at 15 Hz. My problem is that the client does not get the latest version of this file latest.txt when it reads this file every 100ms or so. It seems to be updating the file once a second. For instance, when I check for the contents of the file latest.txt every 100ms, the same contents are printed for 10 checks although the actual file has changed almost every time I check it. It seems to be a cache problem (I really don't need cache - I would like to turn it off if it is not a problem, but I don't know how to do it. Any help will be appreciated. Have you tried oplocks = no? Volker pgptv4QaVepdO.pgp Description: PGP signature -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
Re: [Samba] Files on samba share not updated quickly enough
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 -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
Re: [Samba] Files on samba share not updated quickly enough
Am Dienstag, 17. März 2009 schrieb as: Re: [Samba] Files on samba share not updated quickly enough Von: as rmct...@gmail.com An: volker.lende...@sernet.de Kopie: samba@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 -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba 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 -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
