You shouldn't have a problem serving this all out from one dhcp server even if you have it spread out across several subnets (which I agree you should do if you going to have 160 people on it)
But you could always divvy up one physical class C network into 3 good subnets and be just fine. I would stick with one central DHCP server for management purposes make it a strong server back up the config regularly etc If you have 5 different dhcp server adding WS's would be a joke keeping configs straight etc... So many decisions so many answers > -----Original Message----- > From: Barry McCormick [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, March 05, 2002 1:14 PM > To: Jo; morten > Cc: [EMAIL PROTECTED] > Subject: RE: [Ltsp-discuss] hardware demands for Server when having 160 > client computers? > > I only started using LTSP a couple of days ago, but I worked for quite a > while as a network engineer, so this answer is based on some network > issues. > > 1. you don't want 160 computers on the same subnet/network. You will see > problems and degradation. Break them up into subnets and put routers > between the networks. I might suggest FreeSCO router (Linux, free, only > needs a floppy drive and 2 nics, 16 meg of ram and a 386). Go to > www.freesco.org and check that out. > > 2. Make sure you set up secondary servers in your ltsp.conf files. so > that if one of your servers goes down the second can pickup the load. > > 3. Also, the topography of the wiring and the layout of the network > cables make a big difference. Hopefully if it is a new installation you > are running 10/100 network, and make sure that all of the classroom > routers go back to the central firewall/router to send to the internet. > > 4. You didn't state the requirements for uptime, but I am assuming you > want a pretty good uptime for classes, so my suggestion is to put 2 > smaller servers in each classroom, split the load between the two, and > have the other one set as the failover for the other. > > 5. DHCP - obviously you are going to have to run multiple DHCP servers, > probably one on every server on each subnet. Be very careful with the > numbering scheme you use for each subnet and how the two servers in the > same room designate ip addresses. If you accidentally duplicate numbers > on the two servers, you will play hell running down the error. > > > For what it is worth, there is my 2 cents worth. Maybe it will help you > think the design through a little more. > > Barry McCormick > BMac2 > www.bmac2.net > [EMAIL PROTECTED] > > > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of Jo > Sent: Tuesday, March 05, 2002 12:50 PM > To: morten > Cc: [EMAIL PROTECTED] > Subject: Re: [Ltsp-discuss] hardware demands for Server when having 160 > client computers? > > > I would say: certainly not one big server. I don't have a lot of > experience > either, but you don't want all your eggs in one bag. I read an article > where > they wired two classrooms to one server on one network with the server on > another network for intra- and internet access. I think such a setup makes > sense. Maybe you could have 6 servers and create 3 LANs. 1 for two > classrooms > another for two other classrooms and a third for 3 (smaller) classrooms. > Each > LAN would get 2 servers for redundancy and load balancing. This way you > would > end up with 4 separate LANs. (Of course I would use 10/100 switches for > them. > 3COM has some nice 16 port switches for more or less 30 EUR) The servers > would sit on the school LAN on one NIC and on the TS LAN on the other side. > Somewhere else I read that multiprocessor machines don't age gracefully, > so I > would go for Pentium III, Pentium IV or AMD servers with lots of memory > (>512 > MB) and quick disks. Maybe a RAID5 array of SCSI disks? You should test > performance with one such LAN subnet and see if you are happy with it. > You also have to think about where to put the user's home directories. > Maybe > on yet another server on the central LAN? > > I hope I haven't been talking too much nonsense here... The other people > on > the list will surely correct me if I'm exaggerating :) > > Greetings, > > Jo > > PS: > > On Wednesday 06 March 2002 04:59, you wrote: > > I am setting up a LTS on a "test" school in 2 weeks and i am new to > Linux. > > This school is one of many where we want to install LTS. I have some > > problems finding out how big and many servers i need for this. We need > to > > keep expences nown on minimal so it has to be a compromise solution > between > > investment and quality. > > There will be 160 thin client conected. They will use KDE desktop as the > > default. They will all be running Star Office, Opera, and a educational > > program that in Windows use the same amont of resoureses as IE5.(this > > software is under development for Linux) > > There is 9 classrooms and they wil all be conected trough interenet > using > > the same good conection. > > Should we go for few/one big real server og many smaller strong > computers > > as servers, One in each 2 classroom. > > Do anyone have experiences with this? > > > > Thanks > > Morten > > > > > > _____________________________________________________________________ > > Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: > > https://lists.sourceforge.net/lists/listinfo/ltsp-discuss > > For additional LTSP help, try #ltsp channel on irc.openprojects.net > > _____________________________________________________________________ > Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: > https://lists.sourceforge.net/lists/listinfo/ltsp-discuss > For additional LTSP help, try #ltsp channel on irc.openprojects.net > > > _____________________________________________________________________ > Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: > https://lists.sourceforge.net/lists/listinfo/ltsp-discuss > For additional LTSP help, try #ltsp channel on irc.openprojects.net _____________________________________________________________________ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.openprojects.net
