Step by Step Guide to Add Secondy Node in Oracle EBS R12.2

🔷 Introduction

Step by Step Guide to Add Secondy Node in Oracle EBS R12.2 | Oracle E-Business Suite (EBS) R12.2 supports a multi-node architecture that allows organizations to scale application tier services such as web, forms, and concurrent processing. Adding a new node is a common requirement for load balancing, performance improvement, or environment expansion.

This guide provides a complete, accurate, and production-ready procedure to add and configure a new application tier node in Oracle EBS R12.2 using Rapid Clone.

🔷 Prerequisites

Before proceeding, ensure the following requirements are met:

• ✅ Oracle EBS R12.2 environment is up and running
• ✅ Same OS version and patches installed on target node
• ✅ Application user (applmgr) and database user (oracle) exist
• ✅ Change shared_file_system to true on run and patch file system context file
• ✅ Passwordless SSH configured between source and target nodes
• ✅ Shared Application Tier File System (via NFS or shared storage)
• ✅ Adequate disk space and memory on the new node
• ✅ Source environment context file backup taken

🔷 Architecture Overview (R12.2)

Oracle EBS R12.2 uses a dual file system:

• fs1 (Run File System)
• fs2 (Patch File System)

Both file systems must be properly configured on the new node.

🔷 Step 1: Prepare the Target Node

On the new node:

• Install required OS packages
• Create users and groups:

groupadd dba

useradd -g dba applmgr

• Create directory structure identical to the source system

Change shared_file_system to true on run and patch file system context file

$ echo $CONTEXT_FILE

$ cat $CONTEXT_FILE|grep shared_file_system

🔷 Step 2: Configure Shared File System (NFS)

On Source Node:

Edit exports file:

vi /etc/exports

 

Add:

/u01/appl_top 192.168.1.20(rw,sync,no_root_squash)

 

Apply changes:

exportfs -ra

systemctl restart nfs-server

On Target Node:

Mount the shared file system:

mount -t nfs source_host:/u01/appl_top /u01/appl_top

Verify mount:

 

df -h

🔷 Step 3: Copy Required Files

Ensure the following are available on the target node:

• Application tier file system
• Context files
• Rapid Clone utility

🔷 Step 4: Run Rapid Clone (Important Step)

Start weblogic admin server on run and patch file system.

Run fs.

$sh adadminsrvctl.sh start

Patch fs.

$sh adadminsrvctl.sh start forcepatchfs

Then run adpreclone on run and patch file system.

Navigate to clone directory:

cd $COMMON_TOP/clone/bin

Run the cloning utility:

perl adclonectx.pl addnode contextfile=/u01/app/run/UAT_s2uatebs01.xml pairsfile=/u01/app/run/UAT_s2uatebs01_run.txt dualfs=yes 

 Note:- Use primary node context file and correct pairsfile.

🔹 Provide Required Inputs:

• Target hostname
• Domain name
• Base directory path
• Port pool (choose unique port pool)

🔷 Step 5: Run AutoConfig

After cloning completes, run AutoConfig:

cd $ADMIN_SCRIPTS_HOME

./adautocfg.sh

✅ This step:

• Creates configuration files
• Registers node automatically
• Synchronizes system settings

🔷 Step 6: Verify Node Registration

Connect to database and run:

SQL>SELECT node_name, support_cp, support_web, support_forms FROM fnd_nodes;

Ensure the new node is listed.

🔷 Step 7: Start Application Services

Start services on new node:

cd $ADMIN_SCRIPTS_HOME

./adstrtal.sh apps/apps

✅ Verify Services:

• Apache → Running ✅
• WebLogic → Running ✅
• Forms Services → Running ✅

🔷 Best Practices

• ✅ Always take full backup before changes
• ✅ Ensure time synchronization between nodes
• ✅ Maintain consistent patch levels
• ✅ Regularly monitor logs and services
• ✅ Validate NFS performance for production environments

🔷 FAQ

✅ Q1: Is downtime required to add a new node?

👉 Minimal downtime may be required depending on environment setup.

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✅ Q2: Can I add multiple nodes in R12.2?

👉 Yes, Oracle EBS fully supports multi-node architecture.

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✅ Q3: What is the role of AutoConfig?

👉 AutoConfig synchronizes configuration and registers the node automatically.

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✅ Q4: Is NFS mandatory?

👉 Yes, for shared application tier file system in most setups.

🔚 Conclusion

Adding a new node in Oracle EBS R12.2 is a straightforward process when using the correct tools and approach. By leveraging Rapid Clone and AutoConfig, you can efficiently scale your environment while maintaining system consistency and stability.