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Re: Oracle on RAID - Thanks

From: Tanel Poder <tanel.poder.003_at_mail.ee>
Date: Sat, 23 Aug 2003 04:34:27 -0800
Message-ID: <F001.005CCA9D.20030823043427@fatcity.com>


This is exceptionally good from Gaja's doc:

"A disk cannot spin faster than its design specification, cannot service data-transfers that exceed its I-O bandwidth and cannot support a zillion concurrent I-O operations. This is true regardless who your storage vendor is."

I think I'll get a few cans of spray and gonna paint it to the local storage vendors' walls after dark. Or at least to few salesguys doors who sincerely tell you that you don't have to worry about IO or file placement *at all* since "we got lot's of cache" and "the storage box sorts everything out on his own". (Hm... btw, should storage arrays be called "he" or "she"? ;)

Tanel.

> To whomever posted the link to Gaja's paper Implementing RAID on Oracle -
> thank you. I previously had printed and passed this article on to my
system
> administrator -- no reaction. But yesterday he was building our new Sun
> system with all the latest features, and was so excited about the paper
that
> he asked for a second copy to share with his junior sys admin. He stopped
> building the system to take a day to study Gaja's paper in detail.
> Of course, the Sun engineer is saying "our new RAID 5 is just as fast
as
> RAID 10 because we stripe parity across all disks".
> Since this will be an OLTP system, I am planning on an 8K Oracle block
> size, unless anyone has better information on how to pick a block size.
> Apparently there are a lot of storage system parameters you can optimize,
> but they are based on the Oracle block size.
>
>
>
> Dennis Williams
> DBA, 80%OCP, 100% DBA
> Lifetouch, Inc.
> dwilliams_at_lifetouch.com
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: DENNIS WILLIAMS
> INET: DWILLIAMS_at_LIFETOUCH.COM
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Tanel Poder
  INET: tanel.poder.003_at_mail.ee

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Received on Sat Aug 23 2003 - 07:34:27 CDT

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