[K12OSN] Servers, K12LTSP, and workstation numbers, etc.
Huck
dhuckaby at paasda.org
Mon Jul 24 15:41:21 UTC 2006
Doug,
your bottleneck on that is going to happen at the network level more
likely...I have dual Xeon 3.0ghz with 4 gig of ram...
with 35 terminals all going at the same time...it gets slow on a gig-e
backbone...(with less than 40% CPU usage and has never touched swap file
for memory as far as I can tell when monitoring with 'top')
Perhaps I'm doing something wrong, but the math seems correct..
35*75(approximately) == around to 2 gigs of used bandwidth.
perhaps there is some method of load balancing I can use that I haven't
tried yet...(an application server, 2 k12ltsp servers...)
I am sure 'scalability' is a larger issue with public schools and
districts...luckily we're a small 1 site school with only about 230
students and the LTSP network is merely to augment the Mac and PC labs.
--Huck
Doug Simpson wrote:
> Hello.
>
> I finally have got my Superintendent excited about being able to use older
> hardware to save monty and use K12LTSP for thos older computers to make
> them usable again in Internet/Research/Writing labs in our schools.
>
> I have several servers that have K12LTSP installed and ready to go,
> thinking I could run many workstations from them.
>
> But when I read articles that say a district has 32 servers to deploy
> K12LTSP, I am thninking I am missing something because where is the cost
> savings in that, forst of all, and that means server updates and
> everything will have to be done on all those servers.
>
> Our Supt. is a "Bottom Dollar" kind of guy and he doesn't look at TCO so
> much as what it will cost to "get it in the door".
>
> Say I have a server with 12GB RAM, Almost a terabyte (sp?) of SCSI hard
> drive in Raid5 and Gigabit NICs. Realistically, how many workstations can
> I hang off there using Gnome, Mozilla, OOo, and several other apps on
> intermittent basis and see usable performance?
>
> Also, I have one server, running FC1 with K12LTSP and it serves DHCP IP
> addresses, but I want another server to handle the terminals.
>
> I added the next-server line to dhcpd.conf, but it still looks to the FC1
> server to boot from. The other (preferred server) is FC3, K12LTSP and I
> think it is set up correctly.
>
> What can I look for to make the workstations boot and run from the FC3
> server with DHCP being handled by the FC1 server?
>
> Thanks!
>
> Doug Simpson
> Technology Specialist
> DeQueen Public Schools
> DeQueen, AR 71832
> simpsond at leopards.k12.ar.us
> Tux for President!
>
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