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Re: RAID 1 or 10 for Oracle redo/control files?

From: Andy Rivenes <arivenes_at_llnl.gov>
Date: Mon, 02 Feb 2004 11:03:03 -0800
Message-Id: <5.1.0.14.2.20040202110030.031e3810@poptop.llnl.gov>


You probably saw it on Steve Adams' site at ixora.com.au. He does a great job of explaining these issues.

Andy Rivenes
arivenes_at_llnl.gov

At 11:56 AM 2/2/2004 -0600, Jesse, Rich wrote:
>Hey all,
>
>I know this as been brought up before, but I've been having some difficulty
>finding specific reasons for/against RAID 10 on Oracle redo and control
>files. Here's the info:
>
>We're getting a SAN, whose initial use will be to house a few Oracle DBs.
>I'm proposing that our ERP DB's layout include this:
>
> Redo 01 2 drives, RAID 1
> Redo 02 2 drives, RAID 1
> Control 01 3 drives, RAID 1
> Control 02 2 drives on server, RAID 1 (in case of SAN failure)
>
>I've been asked to prove why the Redos shouldn't be RAID 10, because the
>striping should allow for faster writes. I remember reading that this was
>nullified by the sequential nature of the writes, but I can't remember where
>I saw this.
>
>Cary? Tim? Jonathon? Everyone else here that I forgot?
>
>THX!
>Rich
>
>Rich Jesse System/Database Administrator
>rich.jesse_at_qtiworld.com Quad/Tech International, Sussex, WI USA
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Received on Mon Feb 02 2004 - 13:03:03 CST

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