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Re: most bang for buck with ~ $20,000

From: "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>
To: "Thomas F(dot) O'Connell" <tfo(at)sitening(dot)com>
Cc: Kenji Morishige <kenjim(at)juniper(dot)net>, pgsql-performance(at)postgresql(dot)org
Subject: Re: most bang for buck with ~ $20,000
Date: 2006-08-08 22:28:14
Message-ID: 44D90FFE.7010807@commandprompt.com (view raw or flat)
Thread:
Lists: pgsql-performance
Thomas F. O'Connell wrote:
> 
> On Aug 8, 2006, at 4:49 PM, Joshua D. Drake wrote:
> 
>>> I am considering a setup such as this:
>>>   - At least dual cpu (possibly with 2 cores each)
>>>   - 4GB of RAM
>>>   - 2 disk RAID 1 array for root disk
>>>   - 4 disk RAID 1+0 array for PGDATA
>>>   - 2 disk RAID 1 array for pg_xlog
>>> Does anyone know a vendor that might be able provide such setup?
> 
> Wouldn't it be preferable to put WAL on a multi-disk RAID 10 if you had 
> the opportunity? This gives you the redundancy of RAID 1 but approaches 
> the performance of RAID 0, especially as you add disks to the array. In 
> benchmarking, I've seen consistent success with this approach.

WALL is written in order so RAID 1 is usually fine. We also don't need 
journaling for WAL so the speed is even faster.

Joshua D. Drake

> 
> -- 
> Thomas F. O'Connell
> Sitening, LLC
> 
> http://www.sitening.com/
> 3004B Poston Avenue
> Nashville, TN 37203-1314
> 615-469-5150 x802
> 615-469-5151 (fax)
> 
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