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