Hi, Peter
Your calculation isn't wrong.
I have taken a look at Dell PowerEdge 2900 and see some differences,
that in my opinion make it less valuable system than this "custom".
-memory -I don't see any mention about ECC. Seems, that Dell puts
ordinary memory into server. Cheap, but I won't do so. You mention that
You will store Your data on the server...
-not sure whether hot-swap is "default" or "option" in Dell, however it
is in TYAN
-the difference in real CPU throughtput, mentionet earlier
I cannot figure out, where did You get the price $3300. I went to the
Dell's page, I used configurator to achieve similar system than our
"custom", and get the price near $8900!
Please, take in account, that for the price of "custom" system You get
professional 4-way server (more than equivalent to 4-proc. Intel Xeon
one), with 8G server memory (ECC, registered) and professional SCSI
RAID. I assume, that equivalent system from HP or IBM would cost even more.
You can save some money buying MB with SATA RAID1, cheap SATA drives,
cheap ordinary memory etc. It depends, how much do You value Your data
and where is the border between price and reliability.
I went to Monarch, mentioned in mailing-list, however I ended up with
price around $6000. I don't know, why they offer only expensive 8xx
series Opterons.
Please, re-check Your calculations at Dell. Did You really calculate
both processors, all memory, drives, rackmount chasis etc?
Peter
Hieromonk Peter wrote / napísal(a):
> Elis sI appreciate the advice very much -- really, I do -- but when I price
> out the components to build the server myself, the numbers just don't ever
> seem to come out saving me more than about $300. And for that, I'd rather
> have someone else build the thing.
>
> Yes, if I skimp out and choose some of the slower processors, etc., I can
> save more a little more money, but not all that terribly much. At most I
> might save a third -- not build it for a third.
>
> I tried to price out a server based on what you recommended. Here is what I
> came up with:
>
> AMD Dual-Core Opteron 270 Italy 1000MHz HT 2 x 1MB L2 Cache Socket 940
> Processor - Retail
> http://www.newegg.com/Product/Product.asp?Item=N82E16819103552 -- $461.00 x
> 2 = $922.00
>
> TYAN S2895UA2NRF Dual Socket 940 NVIDIA nForce4 Professional SSI EEB 3.5
> Server Motherboard - Retail
> http://www.newegg.com/Product/Product.asp?Item=N82E16813151149 -- $539.99
>
> Patriot Signature 2GB 184-Pin DDR SDRAM ECC Registered DDR 400 (PC 3200)
> System Memory - Retail
> http://www.newegg.com/Product/Product.asp?Item=N82E16820220098 -- $286.99 x
> 4 = $1147.96
>
> HITACHI Ultrastar 10K300 HUS103014FL3600 (08K2479) 147GB 10,000 RPM 8MB
> Cache SCSI Ultra320 68pin Hard Drive - OEM
> http://www.newegg.com/Product/Product.asp?Item=N82E16822145078 -- $279.99 x
> 2 = 559.98
>
>
> Just that comes to $3,169.93 -- and there is still more to buy.
>
> Or am I doing something completely stupidly wrong in the way I am pricing
> this out? That could be. And if so, feel free to tell me -- but more
> importantly, please tell me how to do it right, because I just don't get it.
>
> I mean, yes, it makes sense that building it yourself should save a person
> money, but the numbers are just not coming out that way for me.
>
> Again, I thank you; but what am I missing?
>
> fp
>
> ----- Original Message -----
> From: Mgr. Peter Tuharsky
> To: Hieromonk Peter
> Cc: ltsp-discuss@lists.sourceforge.net
> Sent: Monday, August 14, 2006 3:12 AM
> Subject: Re: [Ltsp-discuss] Raid 1 or Raid 5? New server advice.
>
>
> Hi, Peter
>
>
> You're asking for experience, so I'd just add my own.
>
> I prefer using dual Opteron systems for servers and by the mean of
> performance, they have never disappointed me. Opteron just has better
> architecture (NUMA; Non-Uniform Memory Access) compared to Intel's old SMP
> (Symetric MultiProcessing).
> With Opteron, every processor has it's own builtin memory controller and own
> memory slots on mainboard, although another processor can of course ask for
> data that are stored in peer processor's memory. Each processor is directly
> connected to another processor.
> With Intel, everything goes thru FSB (Front-Side-Bus), even CPU-to-memory
> and CPU-to-CPU communication, so that system easily gets flooded by intense
> I/O or memory access even if processors don't have much to do. This is also
> the reason, why it often dosen't make much sense to add more and more
> processors to Intel SMP box; The problem usually lays in FSB bottleneck, not
> in lack of processor power.
>
> With Opteron, I have never experienced a situation when system was
> unresponsive. You can really feel the difference against any PC; the FSB is
> no more the bottleneck.
>
>
> You may want to save some money and build a system at Your own, because
> branded servers are expensive and hardly You get exactly what You want. On
> the other way, if You do have enough money, find the configuration that best
> fits Your needs and buy the HP or such server. Youl'll pay 3-times more, but
> You have guarantees and warm feeling :o)
>
>
> This is my advice:
>
> We have a local supplyer that is able to build systems exactly by our
> specification.
> You can use these components:
>
> -Tyan barebone system such as
> http://www.tyan.com/products/html/gt24b2891.html
> This way You get solid rack case with good power supply and motherboard
> inside, that altogether perfectly fit each other. Thus You do avoid problems
> with milimeter-wide disorders and non-fitting components that You'd face if
> You've built from separate MB, case and PSU components.
>
> -2x dual-core Opteron processors (for example model 270)
>
> -8x 1GB ECC registered memory (manual should instruct You, how to use the
> memory slots to gain fast dual-channel memory access)
>
> -The Tyan barebones are in several variants, for example the GT24 has a
> variants for SATA or SCSI disks. I'll go with SCSI, buy some hw RAID
> controller (for example the ADAPTEC 2130SLP for 64-bit 133MHz PCI-X slot)
> -4x identical disks (I'd choose Seagate). Install 3 disks in RAID5
> configuration and leave the 4th disk aside, unplugged, for the case of
> malfunction of one of the three.
>
> And that's it, server made of quality, professional components for 1/3rd of
> price of branded server.
>
> Please note, that I have never used EXACTLY this server configuration. I'm
> only giving my best advice. I work with similar, however less powerful (2x
> single core Opteron, 2GB memory) and tower-based servers (Thermaltake case),
> the newer of them based on Tyan motherboard. Currently our supplier is going
> to build two new systems from Tyan barebones (GT20 (B2865) and GT24
> (B2881G24S4-LC)) for us.
>
> I hope these information are of any value for You.
>
>
> Peter
>
>
>
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