sap overview

Application
Database, Application, Presentation
Database and Application
Database
Two-tier R/3 System configurations are usually implemented using special
Basis System: Three-Tier Computer Hierarchy
Central Database
(Storage of all data)
Access to Dataase:
(Read / Write data)
Database
Input / Output of data to users
R /3 S y s te m
d a ta b a s e
C lie n t
C lie n t
C lie n t
C u s t o m iz in g O b je c t s R e p o s it o r y O b je c t s G lo b a l S e t t in g s
SAP AG
SAP Overview
SAP?
• Company
• ERP Software package
– R/2 – R/3
Why ERP
• Integration
• Best business practices • Standardization
Why not ERP?
• Complexity
• Cost • Inflexibility
R /3
Q uality M gm t. P lant M aintenance
C lient / Server A B A P/4
W orkflow
P roject S ystem
Hum an Resources
Industry S olutions
R/3 System: Hardware/Software Views
R
W h a t is a C lie n t ?
揂 c lie n t is a n a u t o n o m o u s u n it in t h e R /3 S y s t e m w it h r e g a r d t o c o m m e r c ia l la w , o r g a n iz a t io n , a n d d a t a .
R/3 System Configurations
Central System 2-Tier Configuration
SAP
3-Tier Configuration Web-enabled
Presentation Presentation Internet Transaction Service/Web Service
Processing of data using application logic
Application
Presentation
Presentation of the processed data to the user
Client/Server Overview
Server
LAN/WAN
TCP / IP
Corrections and Transport
Development QA Testing Production
Program A
Table A Screen A
Program A
Table A Screen A
Program A
Table A Screen A
Object Migration
Application
Database, Application, Presentation
Database and Application
Database
To web-enable the SAP Applications, a Web Server and an ITS (Internet Transaction Server) are needed. The web-service and the services for the ITS can run on one server or on two dedicated servers. The presentation in this configuration is provided by an Internet Browser. The new SAP Web platform is NetWeaver.
Application
Database, Application, Presentation
Database and Application
Database
An alternative two-tier configuration is to install powerful desktop systems and to use these for presentation and applications (two-tier client/server). This type of configuration is particularly useful for expensive applications (such as simulations) or for software developers.
R/3 System Configurations
Central Systems 2-Tier Configuration
SAP
3-Tier Configuration Web-enabled
Presentation Presentation Internet Transaction Service/Web Service
R
App
io lic a t
n
SAP AG
Sample SAP System Landscape
Development
Database Servers
Testing
Production
Application Servers
Presentation Servers
Object Migration
Development Corrections and Transport QA Testing Program A Version 1 Program A Version 1
?
Program A Version 2
Program A Version 3
?
Program A Version 2
Program A Version 3
Typical Client Server Architectures
Presentation Application Database
Central System Two - tier Distributed System Two - tier Client/Server Three - tier Client/Server Multi-layer Cooperative Client/Server
R/3 System Configurations
Central Systems 2-Tier Configuration
SAP
3-Tier Configuration Web-enabled
Presentation Presentation Internet Transaction Service/Web Service
R/3 System Configurations
Central Systems
SAP
3-Tier Configuration Web-enabled
2-Tier Configuration
Presentation Presentation Internet Transaction Service/Web Service
R/3 System Configurations
Central Systems 2-Tier Configuration
SAP
3-Tier Configuration Web-enabled
Presentation Presentation Internet Transaction Service/Web Service
Application
Database, Application, Presentation
Database and Application
Database
In a three-tier configuration, you use your own host for the three tiers. Using data from the database server, several different application servers can operate at the same time. To ensure that the load on individual servers is as even as possible and to achieve optimal performance, you can use special application servers for individual application areas such as sales planning, distribution or financial accounting.
Quality Assurance Interface Testing User Training