Client/Server Technology

The task of client/server technology components is to provide a reusable runtime environment for other components that use client server technology 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 SAP NetWeaver Application Server.

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 Dispatcher
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 Area	`SM50`	Displaying and Controlling Work Processes
User List	`SM04`	Displaying and Managing User Sessions
System messages	`SM02`	Process SAP System Messages
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`	Configuration of System Resources for aRFC, tRFC, 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. You can find the documentation here: The sapcpe Program.
lgtst, msprot, and msmon are programs for Monitoring and Managing the SAP Message Server.
gwmon is used to monitor the SAP Gateway.