Client/Server Technology 

Purpose

The task of the client/server technology components is to provide a reusable runtime environment for other components that use the client server technology as the basis on which to process requests. The focus is on optimizing operating system resources (CPU, memory, etc.), in terms of performance, scalability, and robustness.

In addition to the components in the SAP kernel there are programs that regulate data traffic in the network, such as the SAProuter and the SAP Web Dispatcher, as well as smaller monitoring and test programs.

The SAP client/server architecture is developed on the SAP NetWeaver Application Server.

Integration

For information on the architecture of the SAP NetWeaver Application Server see Architecture of the SAP Web AS.

Features

Components

The table below lists the components of the SAP kernel that are part of the client/server technology, and for which there is detailed documentation. Some of these functions exist only in AS ABAP, others are also used for  AS Java.

CST Documentation on Subcomponents

Component	Documentation
BC-CST-IC Internet Communication Manager	Internet Communication Manager (ICM) Administration of the Internet Communication Manager SAP Web Dispatchersapurl_link_0007_0006_0008
BC-CST-EQ Enqueue	SAP Lock Concept
BC-CST-UP Update	Update Task in SAP System
BC-CST-MM Memory management	SAP Memory Management
BC-CST-MS  Message Service	Monitoring and Administration of the SAP Message Server
BC-CST-LL Low Level functions	Trace Functions
BC-CST-NU Number Range Buffer	SAP Number Range Buffer
BC-CST-GW Gateway/CPIC	SAP Gateway.
BC-CST-NI Network Interface, SAProuter	SAProuter
BC-CST-SL SAP License	SAP Licensing Procedure

Transactions

The following transactions are also involved in monitoring components and executing basic functions.

Monitoring and Administration Transactions

Transaction	Transaction Code	Documentation
SAP Server	SM51	Overview of SAP application servers
Process Overview	SM50	Displaying and Controlling Work Processes
User List	SM04	Display and manage user sessions
System messages	SM02	Processing SAP System Messags
ICM Monitor	SMICM	Using the ICM Monitor
Gateway Monitor	SMGW	Using SAP Gateway Monitor in SAP System
Message Server Monitor	SMMS	Message Server Monitor
Server resources	SARFC	Configuring System Resources for Parallel RFC, tRFC, and qRFC

Tools for Configuring and Testing SAP Systems

The following additional programs are available for you:

●      sapcpe. With this program you can organize your directory tree locally in UNIX. For more information see Setting Up Local Executives on UNIX SAP Instances.

●      lgtst, msprot and msmon are programs for Monitoring and Administration of the SAP Message Server.

●      gwmon is used to monitor SAP Gateway.