sap notes

1. SAP Overview

5. SAP R/3 System Business Modules Logistical Financial

6. R/3 System: Hardware/Software Views

7. Typical Client Server Architectures Central System Two - tier Distributed System Two - tier Client/Server Three - tier Client/Server Multi-layer Cooperative Client/Server Presentation Application Database

8. Database and Application R/3 System Configurations Central System SAP 2-Tier Configuration 3-Tier Configuration Web-enabled Presentation Database, Application, Presentation Database Application Presentation Internet Transaction Service/Web Service In a central R/3 System configuration, one host is responsible for all processing tasks.

9. Database and Application R/3 System Configurations Central Systems SAP 2-Tier Configuration 3-Tier Configuration Web-enabled Presentation Database, Application, Presentation Database Application Presentation Internet Transaction Service/Web Service Two‑tier R/3 System configurations are usually implemented using special presentation servers that are responsible solely for formatting the graphical interface. Many R/3 System users use PCs with Microsoft Windows ‑installed, for example, as presentation servers.

10. 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. Database and Application R/3 System Configurations Central Systems SAP 2-Tier Configuration 3-Tier Configuration Web-enabled Presentation Database, Application, Presentation Database Application Presentation Internet Transaction Service/Web Service

11. 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. Database and Application R/3 System Configurations Central Systems SAP 2-Tier Configuration 3-Tier Configuration Web-enabled Presentation Database, Application, Presentation Database Application Presentation Internet Transaction Service/Web Service

12. Database and Application R/3 System Configurations Central Systems SAP 2-Tier Configuration 3-Tier Configuration Web-enabled Presentation Database, Application, Presentation Database Application Presentation Internet Transaction Service/Web Service 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.

13. Basis System: Three-Tier Computer Hierarchy Input / Output of data to users Access to Dataase: (Read / Write data) Central Database (Storage of all data) Database Application Presentation Processing of data using application logic Presentation of the processed data to the user

14. Client/Server Overview Client Server LAN/WAN TCP / IP

15. Client/Server Overview (Logical Structure) Client Server Presentation Data Storage Application Logic

20. Sample SAP System Landscape Database Servers Application Servers Presentation Servers Development Testing Production

21. Object Migration Development QA Testing Production Corrections and Transport Program A Table A Screen A Program A Table A Screen A Program A Table A Screen A Export Import Export Import

22. Object Migration Program A Version 1 Program A Version 2 Program A Version 3 Program A Version 1 Program A Version 2 Program A Version 3 Originals Development QA Testing Corrections and Transport ? ?

23. Geography-based Clients R/3 America R/3 Europe R/3 Japan America Client 010 Japan Client 030 Europe Client 020

24. Client Copies Configuration Development Interface Testing Quality Assurance User Training

26. Procurement Process Outline Agreement Demand Purchase Requisition Vendor Purchase Order Goods Receipt & Inventory Mgmt. Accounts Payable Invoice Verification Scheduling Agreement

27. Production Process Goods Issue Shop Floor Goods Receipt Order Settlement Schedule/Release

28. Sales Process — Trading Goods Customer Order Picking Goods Issue Billing Accounts Receivable Packing

29. Sales Process Finished Goods Customer Order Availability Check Goods Issue Billing Partial Payment Final Payment

30. Sales Process Finished Goods Customer Order Availability Check - Insufficient - Independent Demand MRP Run Production Scheduling Purchasing Dependent Demand

31. Process Flow Goods Receipt Goods Issue Billing Accounts Receivable Goods Issue to Shop Floor Production

39. SAP R/3 Resource Management: The Dispatcher Data base Application Presentation Buffers Work Process Work Process Work Process Dispatcher SAP GUI Communications

40. SAP R/3 Resource Management: Data Flow SAP Memory Buffer Relational database system SAP GUI Data base Application Presentation Work Process Dispatcher Terminal Process Request queues 1 3 2 4 5 6 7 Roll Page

41. SAP R/3 Resource Management: Work Processes SAP Dispatcher A B C Background Jobs Spool Enqueue Dialog Update Message M Gateway R/2 R/3 G

42. SAP R/3 Resource Management: Lock Management by the Enqueue Work Process Work Process Update Work Process Enqueue Dispatcher Message Server Instance A Instance B Work Process Update Work Process Enqueue Dispatcher Lock table in main storage

43. SAP R/3 Resource Management: R/3 Instance Database Instance Message Server SAP Gateway Instance Profiles (parameters) SAP Buffers Start or Stop Central Instance Dialog . . . . Update Spool Back- ground Enqueue Dispatcher

44. SAP R/3 Resource Management: Distributed SAP R/3 Processing Dialog Update Enqueue Spool Dispatcher Mess- age Gate- way Instance 01 Enqueue Dialog . . . Dispatcher Instance 02 Dialog Back- ground Enqueue Dispatcher Instance 03