RE: upgrade RAC from to

From: Crisler, Jon <>
Date: Tue, 18 Aug 2009 12:24:34 -0400
Message-ID: <56211FD5795F8346A0719FEBC0DB067504C30593_at_mds3aex08.USIEXCHANGE.COM>

For best practices, you should not share the oracle_home and oracle_crs_home. This allows you to patch each node individually while the other node can keep running. Many patches allow what is called a "rolling patch, or rolling upgrade", although not all.  

[] On Behalf Of sundar mahadevan Sent: Tuesday, August 18, 2009 12:07 PM
Subject: Re: upgrade RAC from to  

I believe I got the answer for ora_crs_home and oracle_home. ora_crs_home(non shared location) is the location for crs binaries(basically clusterware software/binaries reside here) and oracle binaries reside at oracle_home. so ora_crs_home and its binaries reside in all nodes on RAC. The location of the voting disk and OCR is specified later in the OUI installer page that should reside in the shared location. Am I right? Still I dont understand why I received the error when the location I mentioned was shared.

On Tue, Aug 18, 2009 at 11:37 AM, sundar mahadevan <> wrote:

Hi Martin,
Once again you have dropped in to bail me out. Thanks for your reply. My configuration was like this: For shared file system on my test 9i RAC, i used iscsi(iscsi target and iscsi initiator to simulate shared disk between 2 hosts). /var/opt/oracle was the shared disk mount point shared between host 1 and 2. I had created a partition of 20G on the shared disk and used ocfs2 for the shared disk cluster file system. I had quorum file, Shared Configuration File, all database files in
/var/opt/oracle while the binaries were in /opt/oracle/product/9.2.0 on
both host 1 and host 2 individually. To my knowledge, oracm was just oracle cluster manager that was available in 9i and definitely there was no clusterware. With oracm replaced by oracle clusterware, quorum disk replaced by voting disk and shared configuration file replaced by OCR, I still believe that 10.1 RAC should be possible with iscsi(for shared disk) and OCFS2. Do you think it is not possible?

For 10g, I created another partition of size 20G and mounted it on /u01. Now /u01 is shared between 2 hosts. But 10.1 oracle_home and ora_crs_home is a bit confusing. when /u01 is shared, then both
/u01/app/oracle/product/crs(ora_crs_home) and
/u01/app/oracle/product/10.1.0/Db_1 are shared. In this case both oracle
clusterware and oracle binaries would be shared which should n't be the case. What am I doing wrong here. What is the correct setup. Thanks for your time and patience.  

On Tue, Aug 18, 2009 at 1:43 AM, Martin Berger <> wrote:

Hi Sundar,

I'm not sure if you have faced the differences between your 9i and 10g RAC:
In 9i, which kind of clusterware do you have?

In 10g, you will need Oracle Clusterware (CRS - Cluster Ready Services), and your db-binaries in a seperated ORACLE_HOME. If you still needs a shared filesystem, you will also need a cluster framework from a 3rd party, as Oracle Clusterware (up to 11gR1) does not provide a shared filesystem.
Without shared filesystem, you can use pure oracle stack (clusterware + rdbms binaries) and ASM for shared acces to the datafiles. As a last ressort, you can also use raw-devices for your datafiles, but this is not recommended.

You mentioned the 'cluster registry file'. a RAC needs some shared informations. (the cluster registry). this must be stored on a cluster filesystem or shared raw devices. You will also be asked for some voting disks. they also must be accessable on all nodes..

Can you tell which kind of configuration you will try to implement?

best regards,

Am 17.08.2009 um 22:12 schrieb sundar mahadevan:          

	Hi Gurus,
	I'm trying to upgrade my test 2 node RAC presently on to . I can only upgrade it to 10.1 because my test servers only have 512 MB RAM. These are just fine for my home environment and AFAIK 512 MB RAM is good for 10.1. The 9i RAC setup was as follows: I had oracle 9i binaries on /opt/oracle/product/9.2.0 (on both host 1 and 2) and the datafiles on shared disk on /var/opt/oracle. I 'm a little confused as if this is a similar setup in 10.1 as well. I did not find any upgrade documents from 9i to 10.1 but was able to find for 9i to 10.2 Do you think I can follow the 9i to 10.2 RAC upgrade doc. The first thing in this upgrade is to setup CRS. I invoked the crs runinstaller and it asked me for home. I entered the 10.1 CRS home on shared disk(/u01/app/oracle/product/crs) but it gives me an error saying: oracle cluster registry can only exist as a shared system file or as a shared raw partition. Any ideas? Please help. Thanks in advance.      
Received on Tue Aug 18 2009 - 11:24:34 CDT

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