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Re: RAC on QFS

From: DA Morgan <damorgan_at_psoug.org>
Date: Wed, 25 Jan 2006 10:44:34 -0800
Message-ID: <1138214672.461661@jetspin.drizzle.com>


hpuxrac wrote:
> You may want to look at this ... its a Oracle/HP white paper but
> concepts equally applicable to Sun.
>
> http://www.oracle.com/technology/deploy/performance/pdf/TWP_Oracle_HP_files.pdf
>
> We use RAW here. There is more admin overhead using RAW but if you
> don't have a rapidly growing database it is definitely worth
> considering. ( Then again once you go through rman consistently RAW
> management issues are reduced compared to "the dark ages" ).
>
> Oracle is pushing ASM and it's certainly something to consider,
> especially for people with large number of databases and/or databases
> that are growing rapidly in size.
>
> But there is ASM overhead ... oracle doesn't even want to talk much
> about overhead and throughput implications of ASM versus RAW.
>
> The usual answer is "it all depends".

What I have seen is minimal overhead from ASM ... a few percent. Not nearly as much as LVMs that have been tested.

-- 
Daniel A. Morgan
http://www.psoug.org
damorgan_at_x.washington.edu
(replace x with u to respond)
Received on Wed Jan 25 2006 - 12:44:34 CST

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