Enterprise Wide Information Systems SAP R/3 Overview & Basis Technology 1

Topics The R/3 Basis System Technical Architecture Client/Server Architecture Application Architecture System Communication Technical Architecture Client/Server Overview Resource Management Technical Configurations Object Migration The “Database” Client 2

SAP R/3 Basis System Logistical Financial

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 Processing of data using application logic Application Presentation of the processed data to the user Presentation

Typical Basis Systems: Client Server Architecture Central System Two - tier Distributed System Client/Server Three - tier Multi-layer Cooperative (w/ release 4.0B) Presentation Application Database

Basis System: Application Architecture Windows 3.1, Windows 95, Windows NT, OSF/Motif, Presentation Manager, Macintosh ABAP/4, C, C++ DB2/400 OS/400 Windows ‘95 OS/2 IBM AS/400 AT&T Data General SNI Bull/Zenith HP Sequent Compaq IBM Digital ADABAS D, Oracle 7.1, MS SQL Server 6.0 Windows NT UNIX systems Bull HP SNI Digital IBM SUN AIX SINIX HP-UX SOLARIS Digital UNIX ADABAS D, DB2, INFORMIX, ORACLE 7.1 Hardware Operating Systems Databases Dialog SAPGUI Languages

R/3 Communication / Interfaces Remote Function Call Electronic Data Interchange Program Interface Communication Object Linking and Embedding Application Link Enabling R/ 3 Web Interface

Topics The R/3 Basis System Technical Architecture Client/Server Architecture Application Architecture System Communication Technical Architecture Client/Server Overview Resource Management Technical Configurations Object Migration The Client 8

Client/Server Overview LAN TCP / IP Client

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

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

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

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

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

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

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

Technical Configuration Development Testing Production Database Servers SAP R/3 Technical Configuration An SAP R/3 System can consist of one or more instances (e.g. a central instance or a distributed SAP R/3 System). Multiple instances are represented by the configuration of a database server and one or more application servers. Only one database and dictionary will exist for an SAP R/3 System. Note: with R/4, you can have multiple database instances. To isolate each distinct phase of an implementation, a typical or recommended configuration for an SAP R/3 System implementation will consist of three separate systems: Development: for configuration of SAP applications with user specific data and user development. Quality Assurance Testing: to isolate development from final testing and user training for production. Production: of live business transactions and company data. Application Servers Presentation Servers 17

Technical Configuration: Example 18

Corrections and Transport Object Migration 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 Export Import Export Import

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

The Client America Client 010 Europe Client 020 Japan Client 030

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