R3

[Former Member]

In R3 Model, what is R3 means?

[Former Member]

Hi..

Here R3 means 3 tier Architecture

The R/3 architecture consists of 3 layers.

The three layers are:

Presentation layer

The PC-based GUI interface that is used by the end-user community.

Application layer

The SAP application servers that service requests for data and manage the interface to the presentation layer.

Database layer

The actual DBMS that communicates with the application servers to fulfill their requests for data.

A piece of "middleware" called BASIS links the application to the database and the operating system. BASIS is most commonly associated with the GUI interface to SAP (called SAPGUI), and the BASIS Administrator is an SAP professional who is responsible for configuring the SAP environment, including the GUI screens and the SAP application servers.

SAP end users log into their PCs using SAPGUI, and are connected to a specific application server. This application server has pre-established connections with the Oracle database, and it services all requests for data. As I mentioned earlier, the access language for Oracle data is SAP ABAP. ABAP generates Oracle SQL (Structured Query Language), which is then used to service the end user's request for data. The communication between the application servers and the database, and between the client and the application servers, is TCP/IP.

Refer to the link below

http://en.wikipedia.org/wiki/SAP_R/3

Its a very good link and would solve most of your doubts on SAP R/3 architecture.

Award points if it helps.

Regards Rk

Message was edited by:

Rk Pasupuleti

[Former Member]

Hi,

R in R/3 have different defenitions some say Runtime others say Release, some others say Real time..

3 in R/3 means : 3 tier model

SAP R/3 is a client/server based application, utilizing a 3-tiered model. A presentation layer, or client, interfaces with the user. The application layer houses all the business-specific logic, and the database layer records and stores all the information about the system, including transactional and configuration data.

Rgds,

Prajith

[Former Member]

Data stores at DB level.

User works at Presentation layer.

The data flows via Application server.

All the three layers ( DB level, Application layer and Presentation layer ) are collectively called as R/3 level.

So, SAP is an R/3 model.

Cheers