P.V.Anthony skrev:
Hi,
Need some more advice.
Now the question is, is it better to go with 2 core or 4 core?
Hi,
Are you absolutely certain that your server can even max out cpu-wise?
I've found in 99.99% of the cases it's usually other problems; not
enough ram, io or simply wrongly configured services.
With the services you list I'd say if you simply have enough ram, the
cpu really wont matter a thing. Since you'll seem to be doing some
database applications I can only recommend an amd opteron. You dont even
need a dc, but I guess the price difference these days are so small
anyways :).
I'd prolly save the money on the Core2 CPU's and grab an amd opteron
instead, dump software raid 1 and get something like 3ware SATA
controller ( The 8000-model -
http://www.3ware.com/products/serial_ata8000.asp ). Around here these
things sell for roughly €175 or likewise but it's so much worth it. They
come with in-kernel drivers as well as extra goodies in form of a
service which can send you warnings/info/error so you'll always know the
second a disk is fried. They come stock for debian, so I guess it's
there for gentoo as well. They are even hotswappable if I remember
correctly.
Sorry, sidetracked a bit.
I just don't think you'll ever max your cpu with the apps you listed. If
you really have money to burn, smack in 4gb more ram instead - you'll
take advantage of that way more than that extra cpu-power you'll never
really use anyways (Im guessing tho - I dont know your actual usage
patterns with the server)
The reason for this question is, that I heard there is a diminishing
return with more cores. Not sure if this is true with kernel 2.6.21
and running at 64bit.
I dont have any factual data to back this up, but my coworker has stated
on numerous occasions something like:
dual-core intel: 180% performance
dual-core amd: 190%
quad-core intel: 300%
Like I said, I dont have a clue whether that is true or not, so use that
information with care :).
/Martin
The server needed to built is for the following apps.
Hardware.
1. Tyan Tank GT20 (B5191)
2. 2 x Sata drives
3. Software raid 1
4. 4Gb ram ecc
5. Intel Core2Duo E6420 or Intel Core2Quad E6600
Apps.
1. Gentoo linux 64bit
2. Apache 2
3. MySql
4. Postgres
5. Qmail
6. Pure-ftpd
7. Mod_perl
8. php
9. ruby
Will all the instances of the apps be shared among the cores?
Please share the comments.
I would really like to save some money. If the 2 core can do the job
there is quite a bit of savings buying just the 2 core.
The other option is just to go with Pentium D with 2 core. That one is
a real saver.
Please advice.
P.V.Anthony
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