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Date:      Tue, 24 Oct 2006 13:58:11 +0200
From:      "Patrick M. Hausen" <hausen@punkt.de>
To:        Chuck Swiger <cswiger@mac.com>
Cc:        Mike Jakubik <mikej@rogers.com>, stable@freebsd.org
Subject:   Re: Running large DB's on FreeBSD
Message-ID:  <20061024115811.GA10499@hugo10.ka.punkt.de>
In-Reply-To: <3861E2E8-4232-4C46-8D0A-1B6079BCA07D@mac.com>
References:  <453D49D2.1010705@rogers.com> <3861E2E8-4232-4C46-8D0A-1B6079BCA07D@mac.com>

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Hello!

On Mon, Oct 23, 2006 at 04:10:19PM -0700, Chuck Swiger wrote:

> As for the disk configuration, using RAID-5 is one of the worst  
> possible choices for a database; using multiple RAID-1 mirrors or a  
> RAID-10 config would probably do a lot better in terms of performance  
> and reliability.

I second that. And I just want to add: you can easily and reliably
run this configuration in software by the means of gmirror and
gstripe. Saves you some $$ that you would have spent on a "hardware
RAID controller". And it's neither slower nor less reliable.
For anything besides RAID 5, 6 or similar (and you don't want RAID 5
for a transaction heavy system) there is no need for dedicated
hardware anymore. Just get a decent SCSI system with a hot plug
backplane, of course.

HTH,
Patrick
-- 
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