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How to clone oracle apps using simple step by step

Cloning Oracle apps R12

I am Sunny Thakur working as Oracle apps DBA from last 3 years. I worked on many oracle product like  weblogic , OBIEE, Oracle apps and oracle database, ORACLE RMA etc. but I like Oracle apps most. I love to work on oracle apps.

You can also see my previous blog about patching oracle apps here .

The truth about oracle apps is it was a hot technology, it is hot and will remain hot. So for fresher's I will highly recommend oracle apps to take as primary skill :). 

So today I am sharing my knowledge with you guys about how to clone a oracle apps .
Cloning is not very easy to perform. You have to have full knowledge of oracle apps and database also. I will also discuss with you about the common errors that we face while cloning.

Please follow the following steps carefully to clone your system .

STEP  1 :-- Stay calm !!!

Yes, while cloning don't panic at all. I know when you clone your application for first time there is some fear in mind So Please be relax and stay calm.

Now Come to business, Cloning is very simple task . So first question is in mind is :-

Why we need to clone or when to clone oracle apps.
Answer is very simple, We do cloning to replicate our existing system to the UAT or DEV for our developers for testing purpose or if you migrating to new H/W.

STEP 2:-- Prepare your self :)

Yes, Before perform the cloning prepare your self, Do study and if you find this blog I don't think you have to go anywhere :).


NOTE:-- We have oracle apps R12. on Linux and having enough space to take backup. So please first of all make sure you have enough space in your source system(which server you want to clone) . Main objective is to save the time. I am assuming that we have system where we create the UAT for first time.

Preparations :--

If you search for cloning you will find following steps:-

1. PREREQUISITE TASKS
2. PREPARE SOURCE SYSTEM
3. COPY SOURCE TO TARGET
4. CONFIGURE TARGET
5. FINISHING TASKS

PREREQUISITE TASKS :--

Run Autoconfig on both APPLICATION & DB

It is main and very important part of cloning. I am assuming that we have enough space in our source system. First we have to run Auto-config on both application and database servers. For running autoconfig on apps tier we have to shutdown the application, only application not database.
Steps to run Autoconfig on apps tier are as follow:--
1.   Run the environment of oracle apps.
2. Go to $ADMIN_SCRIPTS_HOME then run adstpall.sh to stop the application.
3. In the same directory you will find the script adautocfg.sh .Run this script, it will prompt fro the password. And will take some time to complete.  
4. After successfully completion of the adautocfg.sh on application tier, We have to run the same on the database tier.
5.   Go to the database tier and run .env file from $ORACLE_HOME.
6.  Go to  $ORACLE_HOME/appsutil/scripts/$CONTEXT_NAME and run adautocgf.sh .
7. Now we have successfully run the autoconfig on both tiers.

You can restore your applied autoconfig .
1. Go to $APPL_TOP>/admin//out/MMDDhhmm
2. Run  restore.sh

Run Preclone  on both APPLICATION & DB

On the DB server:

1. go to  cd $ORACLE_HOME/appsutil/scripts/
2 . run perl adpreclone.pl dbTier

On the APPS server:

 1. cd $ADMIN_SCRIPTS_HOME
 2 perl adpreclone.pl appsTier

NOTE:- NOW SHUTDOWN THE DATABASE AND TAKE BACKUP OF BOTH DB & APPS

COPY SOURCE TO TARGET

Copy all the directory to new target system e.g. we have /u01 for database tier and /u02 for apps tier.
then you can use "tar " command to create a zip and send this to target system.
After sending the all the drives to target system and unzip by creating the same directory structure.  

CONFIGURE TARGET 


We first clone the database but first check the permission on the directories . We have to give full permission to user.

On the target Database system

1. Go to $ORACLE_HOME/appsutil/clone/bin
2. Run perl adcfgclone.pl dbTier 
  
Give the inputs that are required. You can change the name, port number, and location of your db tier.

After successful clone of db please check the lsnrctl that everything is running fine.

On the target apps system

1. Go to $COMMON_TOP/clone/bin
2. Run perl adcfgclone.pl appsTier
It will ask you for many inputs. you can change the port also from here.


After completing the cloning process. just check your concurrent manger. and If needed then run cmclean.sql to clean your node.   


FINISHING TASKS

Happy cloning :)


Please update with doubts. I will update this blog. Thanks for your time.












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