Re: Oracle on EMC Question

From: Fraser McCallum <fmcc_at_removetoemail_odbaguru.com>
Date: Tue, 19 Mar 2002 09:25:25 +1100
Message-ID: <_Ktl8.14607$uR5.32382@newsfeeds.bigpond.com>

Buck,

I have had practical experience of this where a System Admin insisted that the EMC cache took care of everything also swearing that the performance stats from the EMC box showed excess capacity and thus no improvements in through put were possible. However when I was given the chance to do some separation of Redo and datafiles at the controller level the performance of the database was vastly improved. So now when possible I do OFA layout on EMC disk arrays but at the controller level rather than the disk level. Note don't be fooled by file systems being different as they may still all reside on the same EMC controller/disks.

Regards

Fraser McCallum
MVP Oracle Administration
www.brainbench.com

"Buck Turgidson" <jc_va_at_hotmail.com> wrote in message news:50f3ec07c83864c0ad4c0d4fd885487f.38849_at_mygate.mailgate.org...
> We are migrating our Oracle/IBM AIX database to an EMC disk array. Our
> DBA has placed all the datafiles in one directory (mount point) on the
> EMC array. He maintains that this is necessary with EMC, and the proper
> way to do it, given the caching that EMC does.
>
> Can someone verify that this is the case? Our DBA has been known to cut
> corners in the past, so I would like a little peer review of this.
>
>
> --
> Posted via Mailgate.ORG Server - http://www.Mailgate.ORG
Received on Mon Mar 18 2002 - 16:25:25 CST