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Oracle 12c Upgrade

This document describes the process of executing Oracle 12c Database upgrades, from the source 11g.

In addition, this manual provides information about compatibility, upgrading applications, and important changes in the new Oracle Database release.

The following activities can be executed with the system up and running.

2. Request Unix team to create additional Logical Volume

3. Create directory /etc/oracle and make it 777. It will avoid the issue faced during the oracle upgrade later on.

4. Check the free space in our HNFS stage. Minimum free space 10GB

5. Backup of current oracle_home and oraInventory (position to the proper source location)

a.    #tar -cvf /net/hnfssap/sap/infra/install/ORACLE12/oraInventory.tar oraInventory

b. #tar -cvf /net/hnfssap/sap/infra/install/ORACLE12/11204.tar 11204

6. Create SPFILE for backup

7. Check the patch inventory, and save the extract to a txt file.

8. Check the oraInst.loc file. Outcome expected is the correct  oraInventory Location

9. Prepare the export display. Open two sessions, one will be used with the Oracle 11g variables and the second one with the 12c Variables:

10. Set the 12c Variables

a.    export ORACLE_HOME=/opt/oracle//product/12102

b.    export ORACLE_HOME_SRC=/opt/oracle//product/11204

c.    export ORACLE_HOME_TGT=/opt/oracle//product/12102

11. Link the new stage located in HNFS. The Oracle 12c Stage contains the latest scripts for the RUNINSTALLER (Patch Level 059 – 02062015). Check                 OSS note 1915301 in case a new script is available

12. Launch the RunInstaller Check

Click Next

Click Yes

Select Install Database software, then click Next

Select Single instance database installation, then click Next

Select English —  Click Next

Select the Database Edition then Click Next

Hidden the

Select the correct Oracle Base and Oracle_Home locations, then click Next

Ignore the WARNING and click YES

Click Next

If already checked with Unix and the warning are still there, click Ignore All then click Next

Click Yes

Check and then click Install

Run the script as suggested

Click on Close

3. Install the Sap Bundle Patch (still with variables 12c)

Link Status:

Link script "./link.hostname.sh" executed successfully

Orasid>

4.  Launch the pre_upgrade script from the new Oracle_Home 12c

a.       sqlplus / as sysdba @pre_upgrade_status.sql

5. Launch the dbua.sh –q and check the warning (in this case, the display variables were not properly set)

User is — ora

6. Launch the upgrade script dbua.sh

Check if the DB is up and running, then click Next

Select Upgrade Oracle Instance, then click Next

Prerequisite Checks will run automatically

Click Next, hidden the

Un-check and then click Next

Un-check and then click Next, hidden the

click Next, hidden the

Select the own backup strategy then click Next, hidden the

Check the details then click Finish

Hostname:/etc # ll |grep oracle

Drwxrwxrwx     2 root        root             4096     oracle

Hostname:/etc #

Refer to this link, if required-:

https://community.oracle.com/thread/3696552?start=0&tstart=0

1. Update the SQL*Net configuration files:

a. Copy the listener.ora, sqlnet.ora and tnsnames.ora from the Oracle 11 to the 12c $ORACLE_HOME/network/admin

b. Adjust the files with the new oracle12 locations

2. Check the symbolic link for the runtime Oracle home.

a. # cd /oracle/

b. # ln -s /oracle/DBSID/12102 121

3. Adapt the environment of the adm user.

a. Log on as user adm and adapt the variables listed below in the .dbenv* files.

b. Set the ORACLE_HOME environment variable to new Oracle home

4. Adapt the environment of the ora user.

5. Edit the /etc/oratab file including the following line:

a. :/opt/oracle//product/12102:N

6. Start the database and listener process as sid user.

7. Perform post-upgrade checks.  Refer Note : SAP Note 1915315

8. Perform post-upgrade tasks

a. $brconnect -u / -c -f stats -t system_stats

b. $ brconnect -u / -c -f stats -t oradict_stats

c. $ brconnect -u / -c -f stats -t all -f collect -p 4

9. Update the Oracle Instant Client.

a. Copy the oracle client from the HNFS location

b. #cd /oracle/client/12x

c. #ln -s instantclient_12102 instantclient

10.  Update BR*Tools.

a. Copy the executables from the HNFS location

11.  Backup the database.

12.  Unistall the old Oracle_Home 11g

a. # ./runinstaller -deinstall -home

End of Document

Nicely written Samar..!! Thanks for sharing..!!

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