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best arrangement of 3 disks for (insert) performance

From: Richard Jones <rj(at)last(dot)fm>
To: pgsql-performance(at)postgresql(dot)org
Subject: best arrangement of 3 disks for (insert) performance
Date: 2003-09-12 10:26:29
Message-ID: 200309121126.29756.rj@last.fm (view raw or flat)
Thread:
Lists: pgsql-generalpgsql-performance
Hi all,
I have some new hardware on the way and would like some advice on how to get 
the most out of it..

its a dual xeon 2.4,  4gb ram and 3x identical 15k rpm scsi disks

should i mirror 2 of the disks for postgres data, and use the 3rd disk for the 
o/s and the pg logs or raid5 the 3 disks or even stripe 2 disks for pg and 
use the 3rd for o/s,logs,backups ?

the machine will be dealing with lots of inserts, basically as many as we can 
throw at it

thanks,
Richard

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