ADM100 SAP PDF

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No part of this publication may be reproduced or transmitted in any form or for any purpose without the express permission of SAP AG. The information contained herein may be changed without prior notice. Some software products marketed by SAP AG and its distributors contain proprietary software components of other software vendors. All other products mentioned are trademarks or registered trademarks of their respective companies. It is not suitable for self-study.

Typographic Conventions American English is the standard used in this handbook. The following typographic conventions are also used. Type Style Description Example text Words or characters that appear on the screen. These include ield names, screen titles, pushbuttons as well as menu names, paths, and options.

Also used for cross-references to other documentation both internal and external. Example text Screen output. This includes ile and directory names and their paths, messages, names of variables and parameters, and passages of the source text of a program.

Example text Exact user entry. These are words and characters that you enter in the system exactly as they appear in the documentation. Pointed brackets indicate that you replace these words and characters with appropriate entries. Icon Meaning For more information, tips, or background Note or further explanation of previous point Exception or caution Procedures Indicates that the item is displayed in the instructor's presentation.

This course is a required prerequisite for attending many advanced courses in the SAP System Administration curriculum. There should be a central instance conigured in every SAP system. Before you conigure two systems and their databases on one host, you should examine the extent to which the chosen hardware is capable of handling the anticipated load.

Other aspects to be considered are situations such as upgrades or restore scenarios for example, one system is to be recreated from a backup whilst the other system should continue to be used without interference. You can only exchange data between two systems with the same SID in an effective way by going to a considerable amount of effort renaming the systems.

An instance of an SAP system is an administrative unit in which components of an SAP system that provide one or more services are combined.

The services offered for an instance can be started or stopped together. ABAP-based instances 2. Java-based instances 3.

This process starts other processes that belong to the instance, such as the gateway abbreviated as GW in the graphic , the Internet Communication Manager ICM , and a conigured number of work processes. You conigure an ABAP instance using an instance proile. The ABAP instance has shared main memory areas and its own directory structure in the ile system.

An instance requires a minimum of two dialog work processes. Otherwise it is not possible to start it. Several instances can be installed on the same host. The instances must then have different instance numbers. The instance number is a two-digit number, and is deined at installation.

It deines a range of standard communication ports for processes of the instance. For example if the instance number 00 was selected at installation. If several instances are installed on a shared host, these instances use their own, separate, main memory areas, and each instance has its own directory structure in the ile system. A single instance is distinguished from these other instances as the ABAP central instance. Furthermore, the central instance is the only instance that offers one or more enqueue-type work processes.

You will ind a description of the ASCS concept in the appendix to this lesson. An instance is also called an application server in the software-oriented view of the client-server model. The application server provides the runtime environment for the business applications of SAP systems. This process distributes the incoming requests to the available server processes.

An instance requires a minimum of one server process. A single instance is distinguished from these other instances as the Java central instance.

It includes an additional process - the Software Deployment Manager SDM - which can only be conigured once across the whole system. In the standard installation, the Java central instance and the CS instance are located on one shared host. You can install additional Java instances on the same host as the central instance or on other separate hosts. It is started and stopped separately. This cluster will then contain the ASCS instance and the database.

Outside the cluster, you may have any number of equal ABAP instances. This means that there is no longer any central instance in your system. On the Java side, the concept is still referred to as a central instance because the Software Deployment Manager is installed here.

This parameter string is normally created by the saplogon. This information comes partly from the coniguration iles of SAP Logon, and partly from a direct request to the message server of the selected system see steps 1 and 2 in the following igure. After the dispatcher has determined a free work process to process the logon, it transfers the logon data to this work process step 4. The work process, in turn, checks whether the received combination of user ID and password is known to the system using a request to the database steps A positive response from the database prompts the work process to return the initial screen of the system to the front end.

During a logon session, the assignment of the user to the instance is unique. Only during a new logon can the user possibly be assigned to a different instance by the message server.

Dialog Work Process Multiplexing The processing of a transaction that consists of multiple screens is usually executed using multiple, different dialog work processes. This distribution is called work process multiplexing. Work process multiplexing means that a system function whose content is logically connected but consists of multiple substeps can be processed by various dialog work processes.

These steps, where the content is connected, are described as transactions. A transaction that consists of multiple screens, such as screens and can also be processed by multiple dialog work processes.

The multiplexing procedure is used exclusively for dialog work processes. All other work process types process entire functions; that is, complete business processes. SAP Logon evaluates various coniguration iles that are stored on the front end. These iles can also be processed using SAP Logon. Passwords can also be written to the the trace ile generated in this way, so you should use this option only with great care; the trace iles should be deleted afterwards.

You can use the New Item There are three possible options. The selection of an already known system from the sapmsg. In case 3, you deine a direct connection to a selected dispatcher. No message server query is necessary here.

Hint: If you see the Groups and Server pushbuttons instead of the New Entries pushbutton, the wizard is deactivated. When logging on using a logon group, the ABAP message server is always contacted irst in order to identify the instance with the best performance within the selected logon group. The coniguration ile sapmsg.

The message server of the selected system is queried to display the available logon groups and application servers. So that the connection to the message server of the system speciied in sapmsg. A connection is then created to the relevant host and the message server running on it using the information from sapmsg.

This means that the ile which contains all known SIDs and their descriptions may need to be updated manually. The best way to do this is centrally, with the ile then distributed to all the relevant hosts note that the SAP Logon iles do not necessarily have to be located on local front ends, but can also be stored centrally. With New Item You then enter all of the system information that is relevant for a logon yourself. The name of the host where you want to contact an instance, its instance number, the System ID, and a description.

A SAProuter is then assigned the task of transferring data for this connection. SAProuter strings can also be speciied using aliases. These aliases are processed using the saproute.

Hint: If you do not want to allow users to edit the system entries in the saplogon. With shortcuts, you are prompted to enter a password, after which the system takes you directly to a preassigned transaction in the chosen system.

In theory, you can also store the password in the shortcut. However, we advise you not to do this for security purposes.

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ADM100 SAP AS ABAP - Administration

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Due to the temporary closure of training centers current status here , all planned classroom training courses in the affected countries have been converted to our virtual learning method SAP Live Class until further notice - thus the original offer is still fully available in these countries. Re-opening of the International Training Centre in Walldorf as of 15 June in compliance with the necessary hygiene regulations and safety precautions. For more details please check our FAQ. COVID measures: Due to the temporary closure of training centers current status here , all planned classroom training courses in the affected countries have been converted to our virtual learning method SAP Live Class until further notice - thus the original offer is still fully available in these countries. Course announcements Are you responsible for the smooth operations of the SAP systems? The course delivers fundamental knowledge you need to keep the system running. During these five days you will learn to start and stop SAP systems and how to configure them, how to manage users and create backups or prepare for a system-maintenance and more.

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