Re: Moving from single instance to RAC

ASM does require RMAN, but if you do RAC with OCFS then it's still possible to do user-managed backups. But yeah, RMAN has some great features and there aren't many reasons left to not use it...

The big question would be how well does your OLTP app scale on SMP... generally speaking apps that run well there will run well on RAC. (There are of course exceptions.) If you have small concurency problems now that have escaped notice then they could become much bigger on RAC once you introduce cache fusion and global locks.

You also mention "stretched cluster" - do you mean an extended distance cluster, where you will have cluster nodes at different physical sites that are miles apart from each other? There are some special issues to be aware of for those deployments... interconnect speeds, data access paths, and quorum/voting disk layout being among them... I'd be cautious about doing an OLTP workload on an extended-distance cluster, but I'm sure that you guys are planning it carefully and testing like crazy. :)

-Jeremy

On 5/31/07, Matthew Zito <mzito_at_gridapp.com> wrote:
>
> There's no requirement to use RMAN if you're using RAC, though Oracle is
> definitely encouraging you to use RMAN universally (not just for RAC).
>
> Matt
>
> ------------------------------
> *From:* oracle-l-bounce_at_freelists.org [mailto:
> oracle-l-bounce_at_freelists.org] *On Behalf Of *Peter McLarty
> *Sent:* Wednesday, May 30, 2007 3:53 AM
> *To:* sjaffarhussain_at_gmail.com; oracle-l
> *Subject:* RE: Moving from single instance to RAC
>
>
>
> You have to use RMAN
>
>
> We are planning to move one of our highly OLTP Oracle 10gR2 database on
> AIX from single instance to 2 node RAC.
> I just would like hear from any of one here about the issues or potential
> problems when moved from a single instance to RAC.
> I would be gald if you guys share you experince or throw some limelight or
> tips.
>
>
>

-- 
Jeremy Schneider
Chicago, IL
http://www.ardentperf.com/category/technical

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