Firefox caching to NFS mounted home directories killing disk IO on file server

Donaldson Jeffrey jdonaldson at
Wed Nov 16 17:22:08 UTC 2011


Thanks for the reply. I have user and group setup with nobody:nogroup 
and 755 permissions. Is this wrong? How do you have your permissions 
setup? Currently we don't have it setup as a local app. Thanks for your 


On 11/16/2011 11:31 AM, Rippl, Steve wrote:
> On Wed, Nov 16, 2011 at 8:10 AM, Donaldson Jeffrey 
> <jdonaldson at <mailto:jdonaldson at>> wrote:
>     I've been trying for a few days now to get Firefox to cache pages
>     to /tmp locally for all users. I updated to Firefox 7, then edited
>     the firefox.js in /etc/firefox/pref to include these lines -
>     pref("general.config.obscure_value", 0);   (supposed to tell FF
>     not to worry about byteshift)
>     pref("general.config.filename", "firefox.cfg");
>     I then took a customized firefox.cfg file and placed it in
>     /usr/lib/firefox-7.0.1.
> This is what we do (to lock down network settings and the like) and it 
> works.  The only problems I can think of are permissions issues on 
>  /usr/lib/firefox-7.0.1/firefox.cfg (can the user read it?) and 
> whether you have an error in the JavaScript in the .cfg file?  Then 
> again this is all run on the server for us (no local apps), are you 
> running Firefox as a local app?
> For what it's worth, we found that many apps and even the Gnome 
> desktop itself didn't work that well with nfs mounted home folders for 
> the students.  We've since moved to having real local folder on each 
> of the LTSP server (we have multiple load balanced) and we use csync 
> ( to synchronize those with the central file 
> server on login/logout and every 10 minutes they're logged in. 
>  Performance went up dramatically and the load on the file server is 
> almost nothing.
> -- 
> Steve Rippl
> Technology Director
> Woodland Public Schools
> 360 841 2730

Jeff Donaldson
Data Services Manager
Newark Charter School
(302) 369-2001 ext:425
jdonaldson at

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