RE: More than 2 ASM Diskgroups in a RAC Enviornment with 2 Databa ses

My recommendation would be to go with the initial plan of two diskgroups per database. Oracle's recommendations seems to come from a philosophy of consolidation where there would only be one database in a cluster.

From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Naqi Mirza Sent: 09 March 2007 07:06
To: K Gopalakrishnan; Oracle-l List
Cc: racdba_at_freelists.org
Subject: Re: More than 2 ASM Diskgroups in a RAC Enviornment with 2 Databases

Gopal,

This is from the the ASM Best Practices Document on OTN. See page 12 of 39, under diskgroups and databases: .
To reduce the complexity of managing asm and its diskgroups, Oracle Recommends that generally no more than two diskgroups be maintained and managed per RAC cluster or single ASM Instance. .
That said, I didn't mean to imply its not supported or not possible - I, only, inferred this from the above. That said, I proceeded to test the install, with the details below - and its all good - works fine (so far). Thanks

Naqi

• Original Message ---- From: K Gopalakrishnan <kaygopal_at_gmail.com> To: naqimirza_at_yahoo.com; Oracle-l List <oracle-l_at_freelists.org> Cc: racdba_at_freelists.org Sent: Thursday, 8 March, 2007 9:12:52 PM 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_at_yahoo.com> 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_at_yahoo.com>
> To: oracle-l <oracle-l_at_freelists.org>
> 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/ <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/ <http://www.amazon.com/gp/product/007146509X/> 



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