Notes in-line
--
Regards
Jonathan Lewis
http://www.jlcomp.demon.co.uk
The educated person is not the person
who can answer the questions, but the
person who can question the answers -- T. Schick Jr
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____UK_______December (UKOUG conference - "CBO")
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The Co-operative Oracle Users' FAQ
http://www.jlcomp.demon.co.uk/faq/ind_faq.html
"Jurjen Oskam" <joskam_at_quadpro.stupendous.org> wrote in message
news:slrnbpsicu.qqa.joskam_at_calvin.quadpro.stupendous.org...
> In article <bnlevm$f93$1$8302bc10_at_news.demon.co.uk>, Jonathan Lewis
wrote:
>
> > Remember, too, that if you are using a Symmetrix,
> > you may have no idea whatsoever about the other
> > I/O that is hitting the same discs at the same time.
>
> If that's the case, you should RTFM. In this case, a nice place
> to start would be 'man symstat'.
>
> > James Morle has written a paper entitled Sane SAN
> > that discusses the issues of black boxes like the
> > Symmetrix.
>
> It's not a black box at all. It *is* another virtualization layer,
> and you *should* make sure you have the knowledge required to take
> full advantage of these high-end storage systems.
>
1) "Virtualization layer" - a marketing term for a black box with
another layer of software introducing another overhead
2) I thought the benefit of a 'virtualization layer' was that
you didn't need to know what was going on underneath !
3) I quite agree with your final point - you certainly should make
sure you have the knowledge required to minimise the problems
inherent in running Oracle databases on a relatively small
number
of big discs. James Morle's paper is a good starting point.
> --
> Jurjen Oskam
>
> PGP Key available at http://www.stupendous.org/
Received on Tue Oct 28 2003 - 09:14:55 CST
