On Sat, Apr 3, 2010 at 10:15 AM, R. Scott Belford <[email protected]> wrote: > On Sat, Apr 3, 2010 at 6:54 AM, Robert Arkiletian <[email protected]> wrote: >> On Thu, Apr 1, 2010 at 7:09 PM, R. Scott Belford <[email protected]> wrote: >>> On Thu, Apr 1, 2010 at 3:29 PM, Rob Owens <[email protected]> wrote: >>>> If the problem is Firefox making too many writes to the users' cache >>>> files, as some people have speculated/demonstrated, then this isn't an >>>> LTSP-specific problem. It should affect any system that has many >>>> simultaneous users accessing /home, such as NFS-mounted home. I imagine >>>> that's pretty common, so I'm surprised that this isn't a more >>>> widely-complained-about problem. >>> >>> Yes. I'll confess that I've been spending more time with the NFS >>> dependent DRBL setups lately, and it's a problem. The only thing the >>> teacher knows is that it's broken; impatient children just start >>> clicking. I handle it by balancing disk arrays and I/O, using Squid >>> when possible, changing browsers, reducing cache, and now, thanks to >>> this thread, I'm pondering ramdisk. >>> >> >> I am also using DRBL and I have not experienced any of these issues. >> The only small lag is at app launch to download the binary executable >> over nfs. Once up Firefox is fine. Even a class of full screen video >> is fine. As for scaling, some school districts deploy 1 DRBL server >> per school (~ 200 clients). > > That's great to hear. I wonder - do you use the SSI setup with DRBL, > or does each user has his/her own /etc and /var directories? It's > possible that some of education apps our schools are using depend more > on Firefox's cache. Have you modified the cache settings per client? >
I'm using the Full DRBL setup, so all clients have their own /etc, /var,... I have not modified any Firefox settings. I'm running 64bit Fedora 11. Clients are new 2Ghz Celerons with 2GB ram and 100Mbps connections to the switch. Everything (sound, video, removable media, cameras, etc) works just like a stand alone system. Students can even run Virtualbox VM's on the clients. -- Robert Arkiletian Eric Hamber Secondary, Vancouver, Canada ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _____________________________________________________________________ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.freenode.net
