Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Mailing Lists -> Oracle-L -> RE: Raid5 Vs Raid0+1 -- Raw Vs Solaris 9 Concurrent Direct IO UFS

RE: Raid5 Vs Raid0+1 -- Raw Vs Solaris 9 Concurrent Direct IO UFS

From: Gogala, Mladen <Mladen.Gogala_at_aetn.com>
Date: Wed, 25 Aug 2004 16:58:19 -0400
Message-ID: <30462D80AA52E74698512ADCC4F7EAA3122396C5@EXCHANGE>


But it also have to compute checksums and wait for all disks to complete I/O before returning the result. In my experience, RAID-5 (EMC-Clariion) was not faster then Symmetrix configured for RAID 1+0. There are great adds for RAID-5 at http://www.baarf.com written by Art Kagel and James Morle, and a great add for RAID-5 on http://www.hotsos.com called "Configuring Oracle for VLDB" by Cary Millsap. Also worth reading is an article by Hank Tulis called "Aligning Oracle Blocks with Hardware Stripe Boundaries" which can also be found on Hotsos and which gives fairly good understanding of the issues with Oracle and Raid. You should read those articles and show them to your SUN representative. If he persists, then take the latest edition of Tom Kyte's expert 1-on-1 and shove it up his...intestines. Tom's book was selected for size, not for any other reason. You can use Encyclopedia Britannica or Yellow Pages for NYC instead.

--
Mladen Gogala
A & E TV Network
Ext. 1216



> -----Original Message-----
> From: Nelson, Allan [mailto:anelson_at_miswaco.com]
> Sent: Wednesday, August 25, 2004 4:14 PM
> To: oracle-l_at_freelists.org
> Subject: RE: Raid5 Vs Raid0+1 -- Raw Vs Solaris 9 Concurrent
> Direct IO UFS
>
>
> Raid 5 does get good read performance because for reads more
> disks get in on the action. 3 in his example vs essentially
> 2 for the raid 0+1 stuff.
---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request_at_freelists.org put 'unsubscribe' in the subject line. -- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------
Received on Wed Aug 25 2004 - 15:54:49 CDT

Original text of this message

HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US