EBS BASIC INTRO

EBS:
It is a product of oracle commonly known as the E business suite. It is a framework for multitier distributed computing. Its various services are distributed among three tier or model. A tier is a logical grouping of services, potentially spread across more than one physical machine. A machine may be referred to as a node, particularly in the context of a group of computers that work closely together in a cluster

1. Desktop Tier
2. Application Tier
3. Database Tier

Oracle EBS installation take place on Database tier which support and manage Database.
Desktop Tier
It is client interface provided by html or html based application and java applet in a browser for the traditional form based application.

1. Form client Applet

            The Forms client applet is a general-purpose presentation applet that supports all Oracle
E-Business Suite Forms-based products, including those with customizations and extensions. The Forms client applet is packaged as a collection of Java Archive (JAR) files. The JAR files contain all Java classes required to run the presentation layer of Oracle E-Business Suite forms. It is also known as Form.

2. Desktop java client

             The Forms client applet must run within a Java Virtual Machine (JVM) on the desktop client. The Sun JRE Plug-in component allows use of the Oracle JVM on web clients, instead of browser's own JVM. This component is implemented as a standard browser plug-in.
The Application Tier
It having dual role:

1. Having the various server services group that process the business logic.
2. Managing the communication b/w desktop tier and the database tier.

It also called the middle tier three servers and services group include the basic operation for the oracle.

1. Web service
2. Form service
3. Concurrent processing service

Note:
In the previous 10 version web service and form service, it was same. In R12 there was no concept of administration services. Patching can be done using any node.
Use of Application tier

1. Load balancing
2. Higher availability
3. Fault tolerance
4. Reliability
5. Optimal scalability

Database tier (DB Tier)

       The database tier contains the Oracle database server that stores and manages all the data maintained by Oracle E-Business Suite. This includes the various types of file in which the tables, indexes, and other database objects for your system physically reside, as well as the database executables. The database also stores the Oracle E-Business Suite online help information.

       The database server communicates with the services and servers on the application tier, which mediate the communications between the database and the clients: there is no direct communication between the database and clients.

1. Mixed Platform Architecture

      The Oracle database server is sometimes available on platforms where Oracle

E-Business Suite is not currently certified. In such a case, it may be possible to utilize a mixed platform architecture, where the database is installed on one platform and the application tier on another. (In Release 11i, this was referred to as a split configuration.)

2. Oracle E-Business Suite Technology Layer

1. Oracle Applications DBA (AD)
2. Oracle Application Object Library (FND)
3. Oracle Applications Utilities (AU)
4. Oracle Common Modules (AK)
5. Oracle Workflow (WF)
6. Oracle Alert (ALR)
7. Oracle Application Framework (FWK)
8. Oracle XML Publisher (XDO)

3. Oracle E-Business Suite Database Features

1. Monitoring Features

1. Automatic Workload Repository (AWR)

2. Automatic Database Diagnostic Monitor (ADDM)

3. Active Session History (ASH)

2. Performance Features

1. Query Optimization
2. Database Resource Manager
3. Partitioned Tables

3. Scalability Features

1. Oracle Real Application Clusters
2. Automatic Storage Management

4. Business Intelligence Features

1. Materialized Views

5. Security Features