basis presentation.ppt

7/28/2019 Basis presentation.ppt

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BASIS Overview


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SAP Architecture

SAP Operation-Mode

Background jobs

Agenda


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TCP/IP

This slide depicts how an application server works. Users make requests at the presentation

layer and through TCP/IP these requests get sent to the application server. The dispatcher

then takes the requests and assign them to work processes which handle the requests.More detailed explanations are on the following slides.


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Standard WorkProcesses:


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SAP Technical Overview

Responsible for the interactive tasks of the

R/3 system

Dialog work processes execute only one

dialog step at a time and are immediately

freed for the next user request

Constantly switching between users

Dialog Work Processes:


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Responsible for executing ABAP

programs submitted for backgroundexecution

Batch jobs schedule the sequence of

program execution

Used for running long and time

consuming programs

Background Work Processes:


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Responsible for formatting the data for

printing and passing it to the host spoolsystem

Only one spool work process allowed

per server

Spool Work Processes :




Responsible for the lock management

system

Synchronizes database access for the

multiple application servers and work

processes

Only one enqueue process per R/3

system to ensure data integrity

Enqueue Work Processes :




Responsible for making database changes

requested by dialog and backgroundprocesses

For better performance, this process

should be on the database server

Update Work Processes :




Used by different application servers to

exchange data and internal messages

Routes messages, such as update or

batch job starts, between application

servers

One message server per system

Message Server:




Allows communication between R/3,

R/2, and external applications

Exchanges large amounts of information

between application servers

Gateway can reside on any of the

connected systems

Gateway Server :



Work processes Maintenance:

SM50


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Processing of a SAP Transaction :

Presentation . . . Internet

Application

Database

Communication

SAPGUI

Work-

process

Work-

process

Work-

process

Dispatcher

TCP/IP

IPC

Local Bufferfor R/3 Data,

DW-Objects,

ABAP-Objects

1

2

3

4

5

6

8

97

1011

12

13 14

Update requestRequest of

already used

data

6. Request of data



Operation Modes :

Purpose : Operating modes are the way that R/3 system allows for flexible

configuration of available services (work processes)

Maximizing the use of available system resources

Automatic switching of work process types

Operating mode is used when there is a requirement of large no of background jobs to be run during less work load.

To Alter the no of work processes.

eg :-

1. It converts specified no of dialog processes to back ground work process

during night time.

2. During day time it converts no of back ground work process to dialog

processes.


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Use

To define separate operation modes for day and nightoperation.

Important data entry transactions during the day.

Job processing at night .

Operation Modes Day and Night Operation :



Tcode : RZ04

Operation Modes Day and night Operation:

STEP : 1



STEP : 2


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STEP : 3


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STEP : 4


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STEP : 5

TCODE: SM63


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STEP : 6


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STEP : 7


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Background jobs :

A background job consists of one or more steps.

A step can be :

An ABAP program

An external command

An external program

A job can be triggered to run: At a predefined date and time

At the occurrence of a predefined event

Background jobs can be prioritized as:

1. Class A (high priority)

2. Class B (medium priority)3. Class C (low priority)

St t C t B k d J b


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Steps to Create Background Job :

SM36

St 2 T C t B k d J b


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Steps 2 : To Create Background Job :


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Step 3: Background Processing


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Status present in Background Job:

1. Scheduled

2. Released

3. Ready

4. Active

5. Finished

6. Canceled

Tcode : SM37


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Tcode : SM37


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Job Active for long time :


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Job Work process details :


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Tcode: SM51

Cross verifying Active job :


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Tcode: SM50

Before Refresh :


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Before Refresh :

After Refresh :


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After Refresh :


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General Table display: SE17


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basis presentation.ppt

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