Re: [K12OSN] My somewhat unscientific network test for traffic
Jack (jackpal@cfl.rr.com)
Thu, 15 Aug 2002 19:12:44 -0400
Thanks for that excellent explanation of the network traffic! I am sure there
are alot of people in here like me who were wondering how this system affects
its network. Especially the ones who watch thier network gear seem to go
bannanas when a few of these things are running.
Jack
On Wednesday 14 August 2002 01:43 pm, Matt Loretitsch wrote:
> This is a little unorthodox, but might be helpful. Someone had posted
> their concern about network traffic and loading linux locally to alleviate
> it.
>
> I said I'd try to get some hard numbers on network traffic, so here is what
> I have... Pentium 75, 32mb of ram. Stock kernel, no special settings.
> Feel free to argue with me about it. Counting is from an HP4000M switch.
> Keep in mind there are a few broadcasts in here, so it's a little bit high,
> but not much. There are approximately 200 other computers on the network
> with me, mostly windows clients. Switch does an excellent job keeping
> traffic down.
>
> boot to ltsp login screen
> 9,276,215 bytes total
>
> after login to Gnome
> 10,699,507 bytes total
>
> open mozilla go to google.com
> 12,133,318 bytes total
>
> open open office.org
> 14,359,976 bytes total
>
> log out, shut down
> 15,021,635 bytes total
>
>
> SO what does this all mean? I broke it down as follows:
> -Convert all bytes total to bits totals (x8)
> -Take 50mbit/second as my network speed. You'll never see 100mb and I'm
> trying to account for collisions etc. in a school environment since
> everyone turns on their terminals at the same time.
>
>
> Network usage time for one client: 2.403 seconds
> 25 clients: 60.086 seconds
>
> I would say that more than 25 clients you might start pushing resources
> hard on initial bootup. Hard drive speed is super important as it is a big
> limiting factor here.
>
> After bootup the traffic pattern will be much more sporadic so you could
> easily handle more clients.
>
> All theoretical! At least it might give some idea of how much traffic
> these things cause.
>
> -Matt
>
>
>
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