Sharing The Application Tier File System in Oracle EBS R12.0 & R12.1

Note: 

• Use a local file system for the Instance Home for optimal performance.
• All application tier nodes must be running the same operating system.
• User ID and group ID should be consistent across all nodes.
• Retain the same absolute path for the mount points of the shared file system on each node.
• Value for the context variable "s_atName" must be same across all the application tier nodes.

The following R12 File System are shared on across the application tier node:

• COMMON_TOP
• APPL_TOP
• OracleAS 10.1.2
• OracleAS 10.1.3
• OraInventory

Adding a Node to a Shared Application Tier File System:
1. Prepare existing node
$ cd $INST_TOP/admin/scripts/
$ perl adpreclone.pl appsTier

2. Make the Applications files accessible
Mount the shared file system disk to the Application node that you want to add so file system is visible from both the application nodes.

3. Configure the node to be added
$ cd $COMMON_TOP/clone/bin$ perl adclonectx.pl addnode contextfile=<source_contextFile_from_primary>
--- This will create a new context file for the node in multi-node system.

$ perl $AD_TOP/bin/adconfig.pl contextfile=<specify_new_contextfile>
--- Run the AutoConfig utility on all the other nodes so that the required configuration files on those are updated with the new node information.