RE: The BIG picture - Advanced file system

Hi Cherie,

The configuration you have there may be excellent for a read-only database, but if you plan to do anything write intensive it is likely to cause problems. There is a maximum of 4 cache allocations for each disk director in an EMC box, which makes it very easy to saturate bits of the cache in write intensive situations, and if you do saturate any part of the EMC cache, you'll find its write performance to be significantly worse than that of unbuffered equivalent disks.

Regards,
Steve Adams

http://www.ixora.com.au/
http://www.oreilly.com/catalog/orinternals/
http://www.christianity.net.au/


-----Original Message-----
From:	Cherie_Machler_at_gelco.com [SMTP:Cherie_Machler_at_gelco.com]
Sent:	Thursday, July 13, 2000 11:06 PM
To:	Multiple recipients of list ORACLE-L
Subject:	Re: The BIG picture - Advanced file system

We have the latest and greatest EMC advanced file systems. Our sys admin has
set up a
single datafile for me to use to create a small database. I am told that I can
put EVERYTHING
on a single datafile and it will be performant because of the built-in striping
and load sharing, etc.
of this EMC disk farm.

I am still a bit skepticle. Is it true that I can put redo logs, data tablespaces, index tablespaces,
rollback, etc. on the same datafile?

Thanks,

Cherie

--
Author:
  INET: Cherie_Machler_at_gelco.com

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