Oracle EBS Online Training

In this model, (oracle-training) various servers or services are distributed among three levels, or tiers. A server (or services) is a process or group of processes that runs on a single machine and provides a particular functionality. For example, Web services process HTTP requests, and Forms services process requests for activities related to Oracle Forms.

Each tier may consist of one or more nodes, and each node can potentially accommodate more than one tier. For example, the database can reside on the same node as one or more application tier components.Note, however, that a node is also a software concept, referring to a logical grouping of servers. Centralizing the Oracle ebs online training software on the application tier eliminates the need to install and maintain application software on each desktop client PC, and also enables Oracle ebs online training to scale well with an increasing load. Extending this concept further, one of the key benefits of using the Shared Application Tier File System model (originally Shared APPL_TOP) is the need to maintain only a single copy of the relevant Oracle ebs online training code, instead of a copy for every application tier machine. On the database tier, there is increasing use of Oracle Real Application Clusters (Oracle RAC), where multiple nodes support a single database instance to give greater availability and scalability. The connection between the application tier and the desktop tier can operate successfully over a Wide Area Network (WAN).

Oracle EBS Online Training

The Concurrent Processing server supports data-intensive programs that run in the background. A tier is a logical grouping of services, potentially spread across more than one physical machine. The three-tier architecture that comprises an Oracle ebs online training installation is made up of the database tier, which supports and manages the Oracle database; the application tier, which supports and manages the various Oracle ebs online training components, and is sometimes known as the middle tier; and the desktop tier, which provides the user interface via an add-on component to a standard web browser. 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.

The Oracle ebs online training is packaged as a collection of Java Archive (JAR) files. The JAR files contain all online oracle classes required to run the presentation layer of Oracle E-Business Suite forms. 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 the browser's own JVM. This component is implemented as a standard browser plug-in. In the traditional, Forms-based Oracle ebs online training environment, the JVM was run as part of the standard Oracle ebs online training sign-on process. Now, the JVM (JRE Plug-in in Release 12) is only invoked when a user chooses to access functions that require it, such as running a form. If the JRE Plug-in has not been installed, the browser prompts the user to download the required installation executable. The Forms client applet and commonly used JAR files are downloaded from the Web server at the beginning of the client's first session. Less commonly used JAR files are downloaded as needed.

All downloaded JAR files are cached locally on the client, ready for future sessions. This online oracle training eliminates the network traffic that would be involved in downloading them whenever they were required. The application tier has a dual role: hosting the various servers and service groups that process the business logic, and managing communication between the desktop tier and the database tier. This Oracle ebs online training tier is sometimes referred to as the middle tier. The application tier supports load balancing among many of its servers and services to help provide higher availability, fault tolerance, reliability, and optimal scalability. The Web listener component of the Oracle HTTP server accepts incoming HTTP requests (for particular URLs) from client browsers, and routes the requests to the appropriate OC4J container.

If possible, the Web server services the requests itself, for example by returning the HTML to construct a simple Web page. If the page referenced by the URL needs advanced processing, the listener passes the request on to the servlet engine, which contacts the Oracle ebs online training database server as needed.