[K12OSN] I need to make Flash work faster....wanna pitch

David Trask dtrask at vcs.u52.k12.me.us
Wed Jan 12 16:08:32 UTC 2005

I'm game to give this a try...in fact I can start with just one for
now....assuming security is not an issue in this case....in other words
let's not worry about private/public keys and all that in this concept
phase....how can I go about setting this up?  In my situation I basically
would be best served by having a dedicated server for FF/Flash.  The
biggest issues arise when everyone in the lab is working on FF/Flash....as
for the rest of the building....they are few and far between enough so
that it's not as much of an issue.  Let me know and I'll get started! 
Thanks for the help!  This'll be fun!  :-)

"Support list for opensource software in schools." <k12osn at redhat.com> on
Wednesday, January 12, 2005 at 10:22 AM +0000 wrote:
>I was thinking the same thing.  Since buying another big machine to
>FF/Flash may not be possible, perhaps one could use a handful of smaller 
>machines.  Then, in the script to call FF/Flash, you have some code that
>'if this script is being called from workstation 1 through 10, run
>FF/Flash on 
>appserver1; if being called from workstation 11 through 20, run FF/Flash
>appserver2' and so on.  The downside is that workstations are tied to
>app servers, and if one of the app servers crashes, those workstations
>automatically switch to another app server.  But...(thinks about it for a 
>moment)...in that same FF/Flash script you could have it check to make
>sure its 
>primary app server is up; if yes, run it from there; if no, go to the
>next app 
>server and repeat.  I'm thinking something like this:
>case $DISPLAY in
>   ws001* )
>     if ping -c 1 -w 1 appsrv1
>     then
>       ssh appsrv1 firefox
>     elif ping -c 1 -w 1 appsrv2
>     then
>       ssh appsrv2 firefox
>     elif ping -c 1 -w 1 appsrv3
>     then
>       ssh appsrv3 firefox
>     fi
>     ;;
>   ws002* )
>     if ping -c 1 -w 1 appsrv2
>     then
>       ssh appsrv2 firefox
>     elif ping -c 1 -w 1 appsrv3
>     then
>       ssh appsrv3 firefox
>     elif ping -c 1 -w 1 appsrv1
>     then
>       ssh appsrv1 firefox
>     fi
>     ;;
>Someone should check my syntax with the case statement, but you get the
>Note how the order of the app server changes depending on which
>workstation the 
>request comes from.  And on the app servers, you'd want to nfs-mount the
>home directories, which would include ~/.ssh/authorized_keys2 so users
>can ssh 
>without needing to give a password and all the other things we've
>regarding the setup of app servers.
>Jim Kronebusch wrote:
>>>Would it not make more sense to offload FF/Flash to a 
>>>dedicated app server?
>> That sounds like a better solution to me.  The whole local app thing
>> seems to contradict what LTSP is trying to accomplish (no local HD's or
>> moving parts, a "thin" client).  I think Gavin Spurgeon (sorry for
>> spelling) has a tutorial on setting this up that looks very simple
>> (haven't actually done it myself yet).  But the downside is I suppose
>> the hardware for local apps is laying around but you most likely don't
>> have another high end server.  I wonder how much of a machine would be
>> needed to just run a single app like FF/Flash for x amount of users.
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David N. Trask
Technology Teacher/Coordinator
Vassalboro Community School
dtrask at vcs.u52.k12.me.us

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