[K12OSN] Performance Issue

[Jack Palmadesso]

I'd say you are on the right track also.  You didn't say how much RAM you
had.  If you can fit more then do it.

Jack

On 3/23/06, David Trask <dtrask at vcsvikings.org> wrote:
>
> You are on the right track....the gig card (serving the apps to the
> terminals) needs to come out of the server and go into a gig port on a
> switch.....after that you can go 100baseT....at least the data coming from
> the server is at full speed.
>
>
> "Support list for opensource software in schools." <k12osn at redhat.com> on
> Thursday, March 23, 2006 at 12:31 AM +0000 wrote:
> >I administer a network at a K-12 school in Winnipeg Manitoba.  I also
> >teach grades 9-12 computer classes, while other teachers use the lab for
> >their classes.
> >
> >I am currently running K12LTSP (ver 4.4.1 I believe) on a dual xeon 3.06
> >MHz computer with 4-80 Gb SATA drives configured on a megaraid-4
> >controller raid 1+0.  2 nics, and 1 is even a gigabyte nic, but all the
> >switches involved in my network are 10/100, so it is not being utilized
> >
> >All applications are run from this one server, except I have a stand
> >alone box that does nothing except host our school's mail.  Currently
> >connecting 35 thin clients which run a variety of applications the most
> >important of which are StarOffice 7 applications, Firefox for
> >surfing/research/ etc, and NetBeans 3.6 IDE for java programming, and
> >KTOUCH.  Elementary classes use such things as TuxPaint, TuxType.
> >
> >When I teach, I frequently run into situations where the kids are
> >doing/accessing the same thing at virtually the same time.  For example,
> >they might all try to start StarOffice Text at more or less the same
> >time.  Regardless of the app, near simultaneous execution of the program
> >bogs down network.  Once in, most apps perform well enough, some notable
> >ones do not, like NetBeans. (it is fine with 5-10 but a pig when 20 use
> >it at the same time.)  And at the end of any class, when 30 ish users all
> >try to log out, the log out process itself is quite slow.
> >
> >I am looking for ways to increase speed/traffic throughput.  This is what
> >I plan to do.  Please tell me if I am on the right track.
> >
> >Run DSL modem into a 8 port 10/100/1000 switch.
> >Plug a Linksys router into switch to grab the outside IP.  Plug the
> >slower 10/100 nic from the server into the Linksys router (internet is
> >limited anyway, so a gigabyte connection would be wasted, right)
> >Run the gigabyte nic from the server into the gigabyte switch.
> >Upgrade my lab switches to 10/100 's but with Gigabyte backbones, which I
> >will use to connect them to the Gigabyte switch
> >Any expansion in the school will use switches with gigabyte backbones to
> >connect to the main, all gigabyte switch
> >
> >I planned to do this because from my reading of this list, and others, I
> >had gathered/assumed that this would have a significant positive impact
> >on speed/throughput.  But today I talked to someone who told me that this
> >won't help all that much because my biggest problem/bottleneck is not the
> >lack of a Gigabyte backbone, but is the hard drive accessbottleneck on
> >the server
> >
> > The solution I was planning above is far less expensive than say adding
> >a few more servers to do clustering.  I have the ok for the Gigabyte
> >solution, but doubt I would get the funds for the clustering option, or
> >have the space currently, to host the extra boxes.  (space is that
> >tight!) Will my plan help at all?  Or am I wasting time/money.
> >
> >Please advice.  Advice/opinions are welcome
> >__________________________________________
> >I am Homer of Borg.  You will be assimilated.
> >Resistance is fut......Hmmmm....DONUTS!
> >
> >
> >
> >
> >
> >--
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> >
> >
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>
>
>
> David N. Trask
> Technology Teacher/Director
> Vassalboro Community School
> dtrask at vcsvikings.org
> (207)923-3100
>
>
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