[K12OSN] K12LTSP Server RAM question

[Petre Scheie]

Another way to get around the memory limitation would be to run some/all apps on 
separate servers.  So, your clients connect to the LTSP server but the icon/menu 
selection runs, say, rsh to another box where, say, OOo is installed but 
displayed remotely on the client.  This is what Largo, FL does.  They don't run 
any apps on the terminal server, and they dedicate a server to each application. 
   With this arrangement, they support over 200 users on a pair of terminal 
servers, and a couple of years ago they reported that each user on the terminal 
server was consuming about 13MB of RAM.  It is, obviously, more complicated to 
set up; but then it also makes maintaining apps easier, because they don't 
interfere with each other, you can take an app server down and the other apps 
still run, etc.

Petre

Julius Szelagiewicz wrote:
> On Tue, 23 Mar 2004, Huck wrote:
> 
>>I'm being told that utilizing a 32bit processor, my server will be
>>limited to 4 gigs of usable RAM...
>>anyone know the validity of this statement and if it IS valid how many
>>machines am I looking at being
>>able to run even with dual p4 2.8Ghz processors?
>>
>>I'm almost to crunch time where I spend my $5k or so on a server for
>>this solution now that I got those G3's
>>working with the little test server...
>>
>>Previous posts mentioned to account for about 128 MB on the server per
>>client...
>>So if 4gigs is the RAM limitation...reserving 256 MB for the server
>>itself...
>>I'd only be able to connect about 30 clients total simultaneously...and
>>this would be at the lower end of
>>performance I would think?
>>
>>Verifiable? Suggestions?
>>
> 
> Huck,
> 	the 4GB limit of directly addressable memory is real - it is the
> direct result of having only 32 bits in the address path. There are
> available "big memeory" kernels. My experience with several ranged from
> poor to dismal, ymmv. If you use an Opteron or 64bit Xeon based
> motherboard, you'll be able to put much more memory in use - the
> limitation will be the motherboard. I hear good things about Opteron
> boards. I have been using 64 bit systems for many years  running HP-UX and
> I can tell you that having tons of memory is not only fun, but it is also
> addictive ;-)
> 	I am running 35 clients on a 32 bit dual Xeon 2.4GHz with 4GB
> memory and a decent scsi array. The response time is very good with
> typical load of gnome desktop, nautilus, oo, gnome terminal, mozilla and a
> few instances of evolution. this system is also used as backup file
> server. the memory is pretty much maxed out, but the swap is very lightly
> used.
> 	good luck, julius
> 
> 
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