[ale] Edubuntu Local Apps and Hard Drives : was Need Help sending PCs to Haiti

[Jim Kinney]

2G for 7 clients is bare minimum. Firefox will eat that in a heartbeat.

4G will give some multitasking room. Still will want to limit RAM
usage with ulimit for each user.

Performance is very subjective! No web vs slow web is huge.

On Wed, Aug 8, 2012 at 2:00 PM, Sergio Chaves <sergio.chaves at gmail.com> wrote:
> So, based on what you are saying, I should be better off putting an extra 02
> Gigs ram on the server (04 gigs total for 06 or 07 clients) than running
> Local Apps on the 486s, right?
>
>
> On Wed, Aug 8, 2012 at 1:43 PM, Jim Kinney <jim.kinney at gmail.com> wrote:
>>
>> Yes. Local apps use the hardware of the actual client. If the client
>> is setup to find and use local drive for cache, then that makes things
>> better than using server-side ram caching. Older LTSP used only
>> server-side. After LTSP5 client-side was an option. It had to be
>> turned on for each client I think. It's been a few years since I've
>> done a LTSP install so I'm rather rusty.
>>
>> Local apps can require stronger hardware than all server-side only. An
>> i486 is pushing limits for local apps. Local apps are good for things
>> that are graphics intensive (flash, video like you-tube, some games -
>> tuxmath). The issue is that ALL of the libs needed to run the app must
>> ALSO be local so RAM becomes an issue for older systems as thin
>> clients.
>>
>> On Wed, Aug 8, 2012 at 1:35 PM, Sergio Chaves <sergio.chaves at gmail.com>
>> wrote:
>> > I think I am confused but starting to see the light. Local apps run in
>> > the client's memory only? No hard drives needed?
>> > When people say they run local apps off the clients, they mean from
>> > memory and not hard drives?
>> >
>> > Sent from my iPhone
>> >
>> > On Aug 8, 2012, at 10:46 AM, Boris Borisov <bugyatl at gmail.com> wrote:
>> >
>> >> I never did setup on newer LTSP I stop at version 3.07 or similar I
>> >> can't recall now (back early 2000's). But back then the local
>> >> applications was terminology i believe for running for example Mozilla
>> >> on the diskless station CPU not on the server CPU. In that way you
>> >> avoid loads of pixels over the network. But application that are
>> >> executed in that fashion are installed in diskless directory tree so
>> >> they get loaded over NFS exports.
>> >>
>> >> What are HD for?
>> >>
>> >> Or maybe everything got changed with new LTSP versions.
>> >>
>> >> Anyway I have 2-3 old HD. Marietta or Dallas. IF I do search over my
>> >> junk I would come up with more.
>> >>
>> >>
>> >> On Wed, Aug 8, 2012 at 10:23 AM, Sergio Chaves
>> >> <sergio.chaves at gmail.com> wrote:
>> >>> I got Edubuntu 12.04 up-and-running.
>> >>> Clients login fine.
>> >>> Problems are the usual ones - Firefox, Flash, etc.
>> >>> Using Local Apps to help.
>> >>> *My* problem is that all client PCs are diskless. Does anyone have 06
>> >>> old
>> >>> HDs (PCs are 486s); size does not matter in this case  :-)  - 20 Gig?
>> >>> Also, does anyone know if there are any changes for setting up Local
>> >>> Apps in
>> >>> 12.04 LTS?
>> >>> The most recent page I could find googling was this page -
>> >>> https://wiki.ubuntu.com/LTSPLocalAppSetup
>> >>> Is it still valid?
>> >>>
>> >>> BTW, I am in McDonough/Hampton area.
>> >>>
>> >>> Thanks for any help on this. I must have everything ready by 09/02 and
>> >>> she,
>> >>> "the one that must be obeyed" is starting to comment on too much time
>> >>> in
>> >>> front of the computers when at home :-)
>> >>>
>> >>> Sergio Chaves
>> >>>
>> >>> Systems Administrator
>> >>>
>> >>>
>> >>>
>> >>> GENCO ATC
>> >>>
>> >>> PRODUCT LIFECYCLE LOGISTICS
>> >>>
>> >>> The Home Depot RLC#8616
>> >>>
>> >>> 180 Westridge Parkway
>> >>>
>> >>> Suite 300
>> >>>
>> >>> McDonough, GA 30253
>> >>>
>> >>>
>> >>>
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>>
>>
>> --
>> --
>> James P. Kinney III
>>
>> Every time you stop a school, you will have to build a jail. What you
>> gain at one end you lose at the other. It's like feeding a dog on his
>> own tail. It won't fatten the dog.
>> - Speech 11/23/1900 Mark Twain
>>
>> http://electjimkinney.org
>> http://heretothereideas.blogspot.com/
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-- 
--
James P. Kinney III

Every time you stop a school, you will have to build a jail. What you
gain at one end you lose at the other. It's like feeding a dog on his
own tail. It won't fatten the dog.
- Speech 11/23/1900 Mark Twain

http://electjimkinney.org
http://heretothereideas.blogspot.com/