Oracle Apps R12 Architecture

The Application Tier :

In Release 12, the application tier contains Oracle Application Server 10g (OAS10g). Three servers or service groups comprise the basic application tier for Oracle Applications: 

•        Web services 

The Web services component of Oracle Application Server processes requests received over the network from the desktop clients. 

•        Forms services 

Forms services in Oracle Applications Release 12 are provided by the Forms listener servlet or Form Socket mode, which facilitates the use of firewalls, load balancing, proxies, and other networking options. 

•        Concurrent Processing server 

Processes that run on the Concurrent Processing server are called concurrent requests. When you submit such a request, either through HTML-based or Forms-based Applications, a row is inserted into a database table specifying the program to be run. A concurrent manager then reads the applicable requests in the table, and starts the associated concurrent program.

Database Tier :

The database tier contains the Oracle database server, which stores all the data maintained by Oracle Applications.

R12 EBS Directory Structure

Techstack Components :

DB_TIER

•        10.2.0.2 RDBMS ORACLE_HOME

APPL-TIER

•        10.1.2 C ORACLE_HOME / FORMS ORACLE_HOME (8.0.6 ORACLE HOME as in

R11i)

•        10.1.3 Java ORACLE_HOME/OC4J ORACLE_HOME (iAS ORACLE_HOME as in

R11i)

INSTANCE_TOP : Each application tier has a unique Instance Home file system associated


Application Directory Structure :-

ORACLE EBS R12 ORACLE_HOMES :-