RE: More than 2 ASM Diskgroups in a RAC Enviornment with 2 Databases
- From: Adrian <ade.turner@xxxxxxxxx>
- To: <kaygopal@xxxxxxxxx>, <naqimirza@xxxxxxxxx>, "'Oracle-l List'" <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 8 Mar 2007 19:05:07 -0000
Hi Gopal,
I believe the intention of the WP is that the S.A.M.E. methodology is
followed.
The more disk groups the less disks would be striped and mirrored within
each one, implying worse performance.
My understanding is that unless you are in the terabyte++ area there is no
reason to have more than one disk group for data and one for flash recovery.
Cheers
Adrian
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]
On Behalf Of K Gopalakrishnan
Sent: 08 March 2007 16:13
To: naqimirza@xxxxxxxxx; Oracle-l List
Cc: racdba@xxxxxxxxxxxxx
Subject: Re: More than 2 ASM Diskgroups in a RAC Enviornment with 2
Databases
Naqi,
Which document you are talking about? We never say 'no more than 2
disk groups per cluster'.
Btw your initial plan seems perfect.
-Gopal
On 3/7/07, Naqi Mirza <naqimirza@xxxxxxxxx> wrote:
>
> I see a similar question to this has already been posted, but just
wondering
> if anyone's actually had to configure something like this before.
>
>
>
>
> ----- Original Message ----
> From: Naqi Mirza <naqimirza@xxxxxxxxx>
> To: oracle-l <oracle-l@xxxxxxxxxxxxx>
> Sent: Wednesday, 7 March, 2007 2:07:47 PM
> Subject: More than 2 ASM Diskgroups in a RAC Enviornment with 2 Databases
>
> Hi,
>
> ---- Start ----
> Config Details:
>
> 2 Node 10gR2 RAC
> HP-UX (PA-RISC) 64 Bit, 11.23
> Serviceguard 11.17
> ASM used as storage option for database and recovery files.
>
> ---- End ----
>
> This 2 node cluster will host 2 RAC databases. Looking at the best
practices
> document for ASM, I see it says that typically you should have no more
than
> 2 diskgroups per RAC cluster.
> However, the initial plan was to create 4 diskgroups - 2 for each
database.
> Just wondering if anyone has done something similar to this, or if anyone
> has more than 1 rac database using asm as the storage?
>
> Thanks
>
> Naqi
>
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--
Best Regards,
K Gopalakrishnan
Co-Author: Oracle Wait Interface, Oracle Press 2004
http://www.amazon.com/exec/obidos/tg/detail/-/007222729X/
Author: Oracle Database 10g RAC Handbook, Oracle Press 2006
http://www.amazon.com/gp/product/007146509X/
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