Sharing a post from my friend "Carthik" on 11gR2 RAC in-place upgrade.
Starting oracle 11gR2 the Oracle database and Clusterware upgrades are done via the "Out of place upgrade". And is the easier way to perform your upgrade. However, the intent of this blog is to explain how an "In-Place upgrade" of a RAC database is done in 11gR2, the advantages, disadvantages, pre-requisites and pain points involved in this method which is the traditional method of upgrading an oracle database. And I have chosen to upgrade a 2 Node 220.127.116.11 RAC Database to 18.104.22.168 RAC Database.
Clearly, the advantage is that you save space, Instead of installing a new Oracle Home.
The greatest disadvantage is that you need to back up the oracle home and run detach oracle home commands. This could potentially damage your oracle binaries. However, when done carefully it should not cause a problem.
The pain points Include:
1. Backing up the Oracle home
2. Restoring the Oracle Home from backup in-case of installation failure.
3. Attach the restored home, and then bring up the instance.
Clearly, there is a lot of manual intervention, which is a major pain point.
The idea behind using an in-place upgrade is to save space. And this method of upgrade requires a significant amount time. The only time one should use this method is when you lack space on your server. However, you can use this method for your test and development environments to save space. Since this method was the traditional method of doing things, I thought it’s worth checking how it works in 11gR2.
NOTE: If you have an existing Oracle Clusterware installation, then you upgrade your existing cluster by performing an out-of-place upgrade. You cannot perform an in-place upgrade to the oracle Clusterware. However, you can perform an in-place upgrade for the database. This will be elaborated in this blog.
Prerequisites for Oracle 11gR2 22.214.171.124 installation is to install patch 9655006 to the 126.96.36.199 GI home before upgrading to 188.8.131.52 from 184.108.40.206. See Bug 9413827 on MOS. For additional details you can refer to the Metalink article Pre-requisite for 220.127.116.11 to 18.104.22.168 ASM Rolling Upgrade Metalink Note : 1274629.1. Additionally ,Refer to "How to Manually Apply A Grid Infrastructure PSU Without Opatch Auto" Metalink Note 1210964.1.
Performing an In-place upgrade of a RAC DB from 22.214.171.124 to 126.96.36.199
In-order to upgrade a RAC Database from 188.8.131.52 to 184.108.40.206 you need to upgrade
1. The grid infrastructure first.
2. Then, the Oracle Database.
Environment Setup Details used in this post:
-- 2 Node RAC Red Hat Linux 5.5 with RACK Servers (R710).
-- Applies to any storage.
It is recommended to we use the Latest Version of OPatch. Unzip the zip file and copy OPatch folder to $ORACLE_HOME And $GI_HOME by renaming
the earlier OPatch directory. You can refer to how to download and Install OPatch Metalink ID 274526.1.
Pre- Requisite Patch:
First, let’s discuss about the mandatory patches required before upgrading to 220.127.116.11. Patch 9655006 is required in order for the upgrade
to succeed, if not rootupgrade.sh will fail.
Patch 9655006 is downloadable from http://www.metalink.oracle.com/ For information on Bug 9655006, refer to Metalink article ID 9655006.8
Download the patch and unzip it to a stage directory (it can be any directory), once you unzip the downloaded patch, 2 folders will be created. In this example I have unzipped the patch to /patches directory.
Now, let’s see how to patch the $GI_HOME with Patch 9655006.
Before the patch is installed, we need to perform a pre-req check. Let’s see how to do this.
1. [[email protected] patches]# su – oracle
2. [[email protected] ~]$ cd /opt/app/oracle/product/11.2.0/dbhome_1/OPatch/
3. [[email protected] OPatch]$ ./opatch prereq CheckConflictAgainstOHWithDetail -phBaseDir /patches
Invoking OPatch 18.104.22.168.6 Oracle Interim Patch Installer version 22.214.171.124.6 Copyright (c) 2011, Oracle Corporation. All rights reserved. PREREQ session Oracle Home : /opt/app/oracle/product/11.2.0/dbhome_1 Central Inventory : /opt/app/oraInventory from : /etc/oraInst.loc OPatch version : 126.96.36.199.6 OUI version : 188.8.131.52.0 Log file location : /opt/app/oracle/product/11.2.0/dbhome_1/cfgtoollogs/opatch/opatch2011-08-16_19-36-09PM.log Invoking prereq "checkconflictagainstohwithdetail" Prereq "checkConflictAgainstOHWithDetail" passed. OPatch succeeded.
Patching the $GI_HOME
1. Stop the Instance running on Node1
srvctl stop instance -d upgrade -i upgrade1
2. As root User run the opatch auto from the $GI_HOME
./opatch auto /patches
Note: The Opatch auto takes care of the patching of both the Grid infrastructure Home and the Oracle Home with the mandatory patch . Once the patching is done on Node1, start the instance on Node1
3. Starting the Instance on Node1
srvctl start instance -d upgrade -i upgrade1
Repeat the process of pre-req and patching on Node2
Once the mandatory patch is applied, we can proceed with the upgrade of the grid infrastructure home.
The software/Patch can be downloaded from My Oracle support: patch 10098816. Select p10098816_112020_Linux-x86-64_3of7.zip
for grid infrastructure download. Once downloaded, unzip them.
Upgrading Grid Infrastructure:
Unzip the patches downloaded and invoke runInstaller from the unzipped grid folder. You will be taken to the welcome screen.
Choose Skip Software updates
Choose Upgrade Gird Infrastructure or Oracle ASM
Choose the Language
The Nodes present are selected by default, Click Next.
Leave the OS groups to Defaults
Choose the New Location where the Grid Infrastructure should be installed
Click on Install
Run rootupgrade.sh on both the nodes as specified in the screenshot
Upgrading the Database via In-place upgrade:
The software/Patch can be downloaded from My Oracle support: patch 10098816.
Select p10098816_112020_Linux-x86-64_1of7.zip and p10098816_112020_Linux-x86-64_2of7.zip for database patch/software download.
Once downloaded, unzip them.
In-Place upgrades (Things to do before performing and In-place upgrade)
When performing an in-place upgrade, which uses the same Oracle home location, an error messages appears stating that the installer
detects Oracle Database software in the location that you specified.
Message: The installer has detected that the software location you have specified contains Oracle Database software release 184.108.40.206.
Oracle recommends that when upgrading to 220.127.116.11, you perform an out-of-place installation of the software into a new Oracle home and
then upgrade the database using the new software binaries.
Cause: The installer has detected that the software location you have specified contains Oracle Database software release 18.104.22.168. Action: Either perform an in-place upgrade (Steps provided in this section), or perform an out-of-place upgrade
Performing an In-Place Upgrade for an Oracle RAC Database
To perform an in-place upgrade for Oracle RAC Database instances:
1. Back up the configuration data by backing up the following directories on all cluster nodes:
2. Run the following command on each of the nodes to detach the 22.214.171.124.0 Oracle RAC ORACLE_HOME:
$ORACLE_HOME/oui/bin/runInstaller -detachHome ORACLE_HOME=126.96.36.199.0 software location
3. Rename the 188.8.131.52.0 Oracle RAC ORACLE_HOME directory on all the nodes to a temporary name.
4. Install release 184.108.40.206 Software Only on all nodes:
From the unzipped folder, invoke the run Installer from the database folder
The welcome screen appears, uncheck the security updates and click next
Choose Skip Software Updates
Select Install Database Software Only and click next
Choose Oracle Real Application Clusters DB Installation and Select the Nodes and click next
Choose the Language and click next
Select Enterprise Edition and click next
Specify the location of the old home, and click next
Provide the Operating System groups and click next
Once the Pre-requisite checks are performed, click next
The summary screen appears, verify the settings and click next
The installation proceeds
Once the installation is done, run Root.sh on both the nodes as instructed and click ok.
Now, on all nodes, restore into the 220.127.116.11 ORACLE_HOME software location the backed up configuration data files
(from the backups you made of /dbs and network/admin), and also restore the following two directories:
/hostname_dbname and /oc4j/j2ee/OC4J_DBConsole_hostname_dbname. Specify the actual name for hostname_dbname.
Database Upgrade using DBUA:
Run DBUA from the 18.104.22.168 ORACLE_HOME/bin directory on the local node and select the 22.214.171.124.0 Oracle RAC database instance to
upgrade it to release 126.96.36.199.0.
The welcome screen appears once you invoke the DBUA, click next to proceed
DBUA Lists the databases that can be upgraded, select the one that you would like to upgrade
You can choose the Degree of parallelism and upgrading the time zone version and click next
Skip this screen by clicking next
The summary screen appears, click on finish for the upgrade to proceed.
The upgrade proceeds
NOTE: The only time one should use this method (in-place upgrade) is when you lack space on your server.
However, you can use this method for your test and development environments to save space.
Since this method was the traditional method of doing things,
Since this method is available, I thought it’s worth checking how it works in 11gR2.
During the entire upgrade process, I never ran into any issues, apart from the slightly higher downtime in
comparison to the out-of place upgrade. However, oracle doesn’t recommend this method. You can refer to the following metalink note 1291682.1.