The first part of the article can be found in http://www.sqlmagazine.com.br/colunistas.asp?artigo=Colunistas/RicardoRezende/06_Raid_P1.asp
The site seems to be down. I was looking forward to reading it. :(
The first and most important step for RAID performance with PostgreSQL is to get a card with onboard battery back-up and enable the write cache for the card. You do not want to enable the write cache *without* battery back-up because of the risk of data corruption after a power failure.
Here is a small example of the performance difference with write cache:
http://sh.nu/bonnie.txt
--
Daniel Ceregatti - Programmer Omnis Network, LLC
A little suffering is good for the soul.
-- Kirk, "The Corbomite Maneuver", stardate 1514.0
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