Strange NFS behaviour

Hello,

i'm experiencing on debian etch the following behaviour with NFS.

I have 1 backend running linux debian sarge that exports via NFS a SVN working copy to a couple of frontend (debian etch) that read the contents of the exported NFS share called /WEB-2 (under drbd ) and publish it via apache.

Sometimes when i update my working copy on my backend i don't see the changes on all the frontends as follows the output on ls on the frontends.

FE-01:~# ls -alio /WEB-2/sites/http/pilot/frontend/contenuto_lista_nozze.php
17237334 -rw-r----- 0 vapache 3387 2008-05-16 11:10 /WEB-2/sites/http/pilot/frontend/contenuto_lista_nozze.php
FE-02:~# ls -alio /WEB-2/sites/http/pilot/frontend/contenuto_lista_nozze.php
17237564 -rw-r--r-- 1 vapache 3801 2008-05-23 11:09 /WEB-2/sites/http/pilot/frontend/contenuto_lista_nozze.php

If i remount the /WEB-1 share on the frontend the changes are seen and updated correctly on all frontends but it's clear that this behaviour is not accetable when writing codes that needs to be updated directly on production.

The exportfs flag options on the exported fs on the Backend are as follows

rw,all_squash,anonuid=4001,anongid=555,no_subtree_check,sync.

Someone could address me in any troubleshooting steps on this issue?

Best Regards,

Simone Carbonara

it's the client-side caching. i used to run into essentially the
same thing when developing on a git repository that's exported over NFSv4, then mounting and building on the clients (with lndir or make O=) -- i'll quick fix a little bug and try to recompile, but the clients don't notice the change until their caches expire or they're forced to invalidate them (say, touch the changed file, but that's lame).

you can experiment with mount options like 'noac' or 'actimeo'
(see the nfs(5) manpage); they'll impact performance somewhat, but maybe in your situation it won't be a problem.

	good luck,

	d
	.

Thank you David for the reply.

That's sounds like the same behaviour. But what i noticed is that .svn dir of the repository is correctly updated while the file remains in this 0 state. Did you see the 0 after the permission fields? I've never experiencing such output.

I've added the noac option just last monday but it didn't fix the problem. I'll try actimeo flag and give you a feedback. I don't care about the performance lately i just need my customer see the changes on the svn repos exported :-).

Thanks a lot.

simone