Oracle EBS R12
Architecture
Oracle EBS R12 Architecture
Oracle EBS R12 Applications is a three-tiered
architecture. 1.Desktop Tier
2.Application Tier
3.Database Tier
The
Oracle Applications Architecture is a framework for multi-tiered, distributed
computing that supports Oracle Applications products. In this model, various
servers or services are distributed among three levels, or tiers.
First we need to know the
important points like SERVER, NODE, MACHINE and TIER. Server : Server is
a process or group of processes that run on a single machine and provide
a particular functionality.
Tier
: A tier is a logical group of services , that
spread across more than one physical machine.
Machine
or node : A machine is referred to
as a node, particularly in the context of a group of computers that work
closely together in a cluster.
Desktop Tier :
The
Forms client applet must be run within a Java Virtual Machine (JVM) on the
desktop client. The Sun J2SE Plug-in component allows use of the Oracle JVM on
web clients, instead of the browser’s own JVM. This is implemented as a browser
plug-in.
Please Note : In 11i , we use Jinitiator for the
for the JVM.
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.
