SAP Basis

ADM100 Lesson: What Is an SAP System?
Lesson:
2
What Is an SAP System?
Lesson Duration: 40 minutes
Lesson Overview
In this lesson, you will learn about the structure and architecture of an SAP
system, and learn how to use the terms system and instance correctly.
Lesson Objectives
After completing this lesson, you will be able to:
• Outline the structure and architecture of an SAP system
• List the technical components of the SAP Web Application Server
• Use the terms system and instance correctly
The instructor introduces the required elements of a complete SAP system
here: the database and a central instance. In this context, you should use
the following description to define the term “central instance”: “Together
with the database, the central instance of an SAP system forms a runnable
SAP system”. As some services are only provided once for each system
(message server), it is logical that there can only be one central instance
for each system.
Business Example
YouwanttolearnaboutthearchitectureofanSAPsystem.
What Is an SAP System?
An SAP System consists of the components shown in the graphic: Exactly
one database and one or more instances. The instance that, together
with the database, creates a runnable SAP system, is called the “central
instance”. A central instance should be configured in every SAP system.
A“central system” exists if the system contains only a single instance, and
this is running together with “its” database on one host.
2003/Q3 © 2003 SAP AG. All rights reserved. 3