[K12OSN] Large scale implementation in the pipe, input needed.

[Daniel Hedblom]

Hello Norbert!

So, a server handling about 150 clients would be how big? Ofcourse those
wouldnt all be running at the same time at full load. The reason i ask is
that i would want to be able to do an estimate on just how big of a server
it would have to be. I want to have solid ground  under my feet and not
just my own experience.

/cheers!

daniel


> Hi,
>
> OK let me qualify ....... from a costing perspective if you're using
> stock P-4s with 2 GB of memory it will be difficult to run more than 25
> clients. Assuming that a full load of SW is used, i.e. OO, mozilla,
> gimp, blender, gcompris, etc...
> However if monies are available for bigger machines with more memory
> then that's another story......
>
> norbert
>
> dhuckaby at paasda.org wrote:
>
>> only 25 clients per server?
>> seems a bit on the low side no?
>>
>> --Huck
>>
>> norbert wrote:
>>
>>> Hi Daniel,
>>>
>>> This is an issue that has come up countless times, school boards try
>>> to centralise the server in the misguided belief that they willl
>>> reduce the amount of maintenance.... (They've been working with M$
>>> for far too long !!!)
>>> X-windows is a very "heavy" protocol, make your life simple install
>>> local servers in each school & run the client from them. I would put
>>> about 25 client per server, have the servers clustered & sit back &
>>> relax.
>>>
>>> good luck
>>>
>>> norbert
>>>
>>> daniel.hedblom at skola.solleftea.se wrote:
>>>
>>>> Hi!
>>>>
>>>> At the school district im an admin at there are talks about
>>>> implementing a
>>>> large scale k12 LTSP solution. We have been testing succesfully on one
>>>> school but only with about 15 clients. The latest bid is to have one
>>>> big
>>>> central server. It will be serving a cuple of other schools over 1
>>>> gbit
>>>> fiber connections. An estimate over the number of clients would be
>>>> about
>>>> 50-60 at two schools and maybe 40 additional from other smaller
>>>> schools
>>>> and locations.
>>>>
>>>> I have been pondering this quite a bit and im a bit concerned about
>>>> the
>>>> cost of the server and backbones etc. Since other traffic flows in the
>>>> same fibers there will have to be some kind of vlan separating the
>>>> traffic
>>>> since passwords etc flows unencrypted between client/server. I really
>>>> would appriciate input on this since i have a thing for linux and
>>>> wouldnt
>>>> want an implementation to go wrong at my own turf. Is a central
>>>> server a
>>>> good solution or is the benefit smaller than percieved? Have anyone
>>>> done
>>>> this in a grand scale and what was the pitfalls in those cases?
>>>>
>>>> Im perticulary interested in how scaling have been solved on big
>>>> sites.
>>>> Have tried an openmosix cluster but the benefit was small since we
>>>> dont
>>>> run any cpu intensive applications.
>>>>
>>>> In short, is it a good solution to get a big iron hosting everything
>>>> instead of spreading several smaller Terminal Servers onsite and just
>>>> centralize /home and logins?
>>>>
>>>> All inputs are appriciated.
>>>>
>>>> Cheers!
>>>>
>>>> /daniel
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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>>>>
>>>
>>>
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>>>
>>
>>
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>
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-- 
------Disclaimer-----
The expressions in this mail are my own.

Daniel Hedblom
Network Admin             Mobile +46 70-383 72 44
Nipan School District     Work   +46 620-68 26 38
Sweden