[K12OSN] Server choices

[Robert Arkiletian]

On 7/27/06, pogson <robert.pogson at gmail.com> wrote:
>
>
> Michael Blinn <mblinn at peopleplaces.org> wrote:
>
>    I'm nearing the purchase point of my terminal server, but I thought
> before laying down the serious $$, I should get the opinions of those
> who have been there before!
>
>
> I have just been through that. I was looking at building two dual - dual
> core Opteron 165 systems for about $7000 including 16 gB RAM. I decided that
> I could get more bang for the buck by using different configurations for the
> terminal servers and the web/dhcp/mysql/nfs server. What I came up with was:
>
>
>    - four AMD64 X2 3800 systems for terminal servers with four 40 gB
>    drives in RAID1 and 4 gB RAM each
>
>
What motherboard did you go with?
Also wondering what performance 4 drives (assuming 7200rpm SATA)  in a RAID
1 produce? Anyone have experience with this compared to a 15k rpm scsi
drive? IMO Write speed should be the same as one drive but will read speed
really scale 4x?



>    - two AMD64 X2 3800 systems for web/dhcp/mysql/nfs on /home and /var
>    with four 320gB drives and 2gB RAM each in a fail-over cluster
>
> which costs about the same, except I get 16 heads on / for the terminal
> server  and I get two extra chips working as separate servers. I get more
> horsepower overall except I have smaller caches. I should be able to run
> with one terminal server and one web server down, not that I expect that
> ever. I expect my LAMP stack to get a lot of work from about one third of my
> clients, so I thought this was better, separating terminal service from
> web/nfs/db. I believe I made the right decision even though the parts are
> still in transit, especially when the AMD cuts came in... The cut to AMD64
> X2 3800 was close to 50%, and he threw in free freight... I will have 150
> PXE thin clients usually with 50 old Windows machines useing web service,
> until they find out how much fun 3800 is compared to 400 [image: ;-)] when
> I expect to have 200 PXE clients. 30 clients were happy on my AMD64 3000
> single core with 2gB, so I figure 50 will be happy with 3800 X2 with 4gB,
> especially when the PHP scripts aren't loading things down. I have
> Wikipedia, Moodle, phpBB, etc., available. With all the redundant storage
> and multiple heads, I doubt this system will get bogged down.
>
> --
> A problem is an opportunity.
>
>
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>


-- 
Robert Arkiletian
Eric Hamber Secondary, Vancouver, Canada
Fl_TeacherTool http://www3.telus.net/public/robark/Fl_TeacherTool/
C++ GUI tutorial http://www3.telus.net/public/robark/
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