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Re: RAID Configuration Sugestion

From: Bruno Wolff III <bruno(at)wolff(dot)to>
To: Alvaro Nunes Melo <al_nunes(at)atua(dot)com(dot)br>
Cc: PostgreSQL - Performance <pgsql-performance(at)postgresql(dot)org>
Subject: Re: RAID Configuration Sugestion
Date: 2005-08-30 12:58:08
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Lists: pgsql-performance
On Tue, Aug 30, 2005 at 09:37:17 -0300,
  Alvaro Nunes Melo <al_nunes(at)atua(dot)com(dot)br> wrote:
> The server is a Dual Xeon 3.0 with 2 GB RAM and two SCSI disks. Our main 
> doubt is what is the best configuration for the disks. We are thinking 
> about use them in a RAID-0 array. Is this the best option? What do you 
> suggest on partitioning? Separate partitions for the OS, data and pg_xlog?

You don't have a lot of options with just two disks. What are you trying
to accomplish with raid?

Raid 0 will possibly give you some speed up, while raid 1 will give you some
fault tolerance, some speed of of reads, but cost you half your disk space.

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