> > 60 Schools x 400 pupils per school
> >
> > Each school has 10Mb link to Internet ( lets say they only have 20
> > computers per school)
10Mb link to the net?!?!?! For 400 kids?!?!?! Geez...
> > 400 x 60 email addresses are required of .edu addresses 24,000 addresses
> > + teachers addresses
> > 400 x 60 email addresses are required for .com addresses 24,000
> > addresses+ teachers addresses
Won't these be the same e-mail addresses? Just multiple domains?
> > My question is how many email pop boxes can I put on 1 server?
A lot. But for the number you're looking at, you need to look at using
a database for the mail store and user lists. You don't want to create
24,000 real accounts. That would be a security and administrative
nightmare. Instead, take advantage of the fact that sendmail is just
and MTA and uses an external application to deliver mail. The default
external delivery program is simply /bin/mail, but there is nothing
stopping you from changing to /usr/local/bin/my_deliver or something
similiar.
> > How many concurrent connetctions will a server cope with for http
> > requests?
The kernel, by default, can handle about 4000 concurrent connections.
Realistically, with 24,000 users you wouldn't have more than a few
hundred at any given time since none of the services you intend to
offer require persistant services.
> > (Say the server is a PIII 700 512Mb Memory Hardware RAID)
I'd recommend going with a smaller/cheaper box and buying more of
them. This gives you better protection in the event something goes
wrong and you need to take a machine offline. The catch to this
solution is that you need to make sure the software you use works
nicely in a distributed environment. AFAIK, most ISP's end up doing
homebrew solutions if they want to stay cheap. I'm sure Oracle will be
more than happy to sell you a pre-built one for the price of a small
country. (Details, details...)
You should also consider co-locating the boxes if possible. Especially
if you aren't going to be near the boxes at all times and you can't
get a server room with a locked door. The last thing you need is
someone bringing their kid in who thinks all filenames start with C:\
to "fix" your server if something goes wrong. Most academic places
will try to get by as cheap as possible -- fight for a server room. My
personal experience has been that servers seem to magically fare
better and get reboot less often when physical access is taken away
from mortals.
Best of luck,
-Steve
--
______________________________________________________________________________
Steve Shah ([EMAIL PROTECTED]) | Alteon Web Systems Inc. (Developer/Sysadmin)
http://www.alteon.com | Voice: 408.360.5500 Fax: 408.360.5500
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Beating code into submission, one OS at a time...
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