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Re: Hardware purchase question

From: "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>
To: Vivek Khera <khera(at)kcilink(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Hardware purchase question
Date: 2004-12-13 17:23:13
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Lists: pgsql-performance
> However, I keep getting conflicting advice.  My choices are along
> these lines:
> Dual Xeon 64bit with built-in 6-disk RAID10 or RAID5 (LSI RAID card)
> Dual Opteron 64bit with built-in 6-disk RAID10 or RAID5 (LSI RAID card)
> Dual Opteron 64bit with external RAID via fibre channel (eg, nstor)

An Opteron, properly tuned with PostgreSQL will always beat a Xeon
in terms of raw cpu.

RAID 10 will typically always outperform RAID 5 with the same HD config.

Fibre channel in general will always beat a normal (especially an LSI) raid.

Dell's suck for PostgreSQL.


Joshua D. Drake

> I'm sure any of these will whip the bottom off the Dell 2650, but
> which will be the fastest overall?  No way to know without spending
> lots of money to test. :-(
> Dell claims their new 2750 will be faster, but they've lost the battle
> already, and won't commit to any performance numbers.  Won't even give
> me a ballpark number.

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