<div>On 7/25/06, Doug Simpson <<a href="mailto:simpsond@leopards.k12.ar.us">simpsond@leopards.k12.ar.us</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> 25 clients per server. . . we'd need about 40 servers. . .They'd never go for that. . . I was hoping to be able to serve hundreds per server. . .</blockquote><div> If you are going to have hundreds on at the same time running Firefox and OOo on 1 server (maybe the entire school): Go Opteron. A single 2.0 Ghz Opteron can handle about 25 clients. That's about 80 Mhz / client (BTW Xeons require about 100Mhz/client). If you get a dual Opteron MB that supports dual-core cpu's you can put 4 cores it ( two Opteron 270's ) That should be able to support 100 clients simultaneously provided you have about 80mb ram / client and use Icewm. So you will need 8G ram. Make sure you have 15K rpm SCSI drives in Raid 1 or 5 with an LSI or 3ware controller (preferably with it's own cache) and of course a Gigabit NIC on eth0. The quad cpu motherboards and 800 series Opterons are *VERY* expensive. </div> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Not a good deal, but. . . Doug Simpson Technology Specialist DeQueen Public Schools DeQueen, AR 71832 <a href="mailto:simpsond@leopards.k12.ar.us">simpsond@leopards.k12.ar.us</a> Tux for President! On Mon, 24 Jul 2006, James P. Kinney III wrote: > It really boils down to networking at the Enterprise model level. Tests > have show that a 1Gb data line can support 25 clients. > > RAM is still king as each client will need 50-75 MB of RAM. > > We had about 56 clients hanging from a dual Opteron (single core) server > w/4GB RAM and dual, bonded Gb NICs. The load level was getting heavy but > OK until firefox got loaded. At that point, swap got hit and the box > thrashed itself into oblivion. A hard reboot later (and turning OFF > swap) and it _could_ run 56 clients but it was dragging. > > So for the "Bottom dollar" person: a single chip, dual core w/ 2GB RAM > and 2 NICs (one Gb for clients, the other 100Mb for Internet) and a > 120GB hard drive will serve 25+ clients very well. This a good model for > an "app server". > > On Mon, 2006-07-24 at 10:15 -0500, 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 > > <a href="mailto:simpsond@leopards.k12.ar.us">simpsond@leopards.k12.ar.us</a> > > Tux for President! > > > > _______________________________________________ > > K12OSN mailing list > > <a href="mailto:K12OSN@redhat.com">K12OSN@redhat.com</a> > > <a href="https://www.redhat.com/mailman/listinfo/k12osn">https://www.redhat.com/mailman/listinfo/k12osn</a> > > For more info see < <a href="http://www.k12os.org">http://www.k12os.org</a>> > -- > James P. Kinney III \Changing the mobile computing world/ > CEO & Director of Engineering \ one Linux user / > Local Net Solutions,LLC \ at a time. / > 770-493-8244 \.___________________________./ > <a href="http://www.localnetsolutions.com">http://www.localnetsolutions.com </a> > > GPG ID: 829C6CA7 James P. Kinney III (M.S. Physics) > <<a href="mailto:jkinney@localnetsolutions.com">jkinney@localnetsolutions.com</a>> > Fingerprint = 3C9E 6366 54FC A3FE BA4D 0659 6190 ADC3 829C 6CA7 > _______________________________________________ K12OSN mailing list <a href="mailto:K12OSN@redhat.com">K12OSN@redhat.com</a> <a href="https://www.redhat.com/mailman/listinfo/k12osn">https://www.redhat.com/mailman/listinfo/k12osn </a> For more info see <<a href="http://www.k12os.org">http://www.k12os.org</a>> </blockquote></div> -- Robert Arkiletian Eric Hamber Secondary, Vancouver, Canada Fl_TeacherTool <a href="http://www3.telus.net/public/robark/Fl_TeacherTool/">http://www3.telus.net/public/robark/Fl_TeacherTool/</a> C++ GUI tutorial <a href="http://www3.telus.net/public/robark/">http://www3.telus.net/public/robark/ </a>