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RE: RAC environment patching and availability

From: Peter McLarty <>
Date: Tue, 11 Sep 2007 13:32:21 +1000
Message-ID: <>

This would depend on what you mean by the patches being applied to the database. If like peoplesoft that it updates stored procedures or stored code that is kept in the database for queries and functions, then there is no patches applied to the database in the sense of a dba patching Oracle.
I guess, unless the patching applies an Oracle delivered patch like you would install with opatch, then you don't have anything to worry about as that is not patching.  

As for if you can keep the database open then that is up to the individual applications, If you are referring to Oracle Application Server, then I understand with later versions that in some cases this is possible, but you need to review the documentation for that patch or patch bundle.  



From: Binh Pham [] Sent: Tuesday, 11 September 2007 01:03 PM To:; Cc: Oracle-l List
Subject: RE: RAC environment patching and availability

I have a question. Supposed if I want to apply an Application patch and keep the database available to the users during that time for concurrent updates, what will the process be? Remember the Application patch also apply updates to the database as well.


	Date: Mon, 10 Sep 2007 11:05:26 -0700
	Subject: Re: RAC environment patching and availability
	Li Li,
	In current versions, JUST RAC alone can not provide the 24x7
availability. You need to have the combination of RAC+Dataguard (logical) to have REAL 24x7 availability. Also not all patches/upgrades are 'rolling upgrade' capable.

        Have a look at this presentation to undertand the issues in rolling upgrade.  o.pdf          


	On 9/10/07, Li Li <> wrote:

> Hi, All,
> I recently patched our 2-node RAC ( on RHEL AS 4
update 4) to
> I got the impression that you can do rolling upgrade
in a RAC
> environment, until I dig into the patch installation document
and found out
> that you can do rolling upgrade on the clusterware part but
not on the RAC
> database part. Fortunately we can afford the service to be
down for a couple
> of hours.
> My question is: is there a way to keep your RAC database up
while you patch
> it? RAC itself doesn't really provide 24x7 High Availability?
Any comments?
> Thanks,
> -Li
-- Best Regards, K Gopalakrishnan Co-Author: Oracle Wait Interface, Oracle Press 2004 Author: Oracle Database 10g RAC Handbook, Oracle Press 2006 ________________________________

Can you find the hidden words? Take a break and play Seekadoo! Play now! <>

Received on Mon Sep 10 2007 - 22:32:21 CDT

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