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Re: Recommended RAID for Postgres

From: Michael Monnerie <michael(dot)monnerie(at)it-management(dot)at>
To: pgsql-admin(at)postgresql(dot)org
Subject: Re: Recommended RAID for Postgres
Date: 2008-06-30 15:40:54
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-admin
On Montag, 30. Juni 2008 Thomas Bräutigam wrote:
> Why avoid RAID5?

RAID5 has very poor WRITE performance compared to RAID10, while READ is 
nearly the same speed.

If you do not have a "branded" server like HP or IBM, I can recommend 
the Areca RAID controllers their driver is 
included in Linux kernel, and they are pretty damn fast. Change the 
onboard RAM to 2GB, with the SAS 16 or 24 port controller this is the 
way to have fun.

On their website is also benchmarks about different RAID levels, so you 
can compare them.

mfg zmi
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