Client Administration

What Is client ?

• The Client is an independent business unit within an R/3 system.
       
• Data in the R/3 are classified as Client-dependent and client-independent.
     
• Data such as ABAP Programs, R/3 repository objects, etc. and are available through the system. And are client independent.
  
  
•  The client-dependent data includes customizing, application, and user data.
  
• Within one SAP instance, a number of Clients can be created. No need to install separate software's for each and every client.
  
  
• For Example :  100, 200, 300.

What does client contain?

• Application Data- Application data is the data that are stored in the database tables.
  
  
• Customizing Data - Customizing data is data created by customers when they customize their systems.
  
  
• User Master Record- A user master record defines the authorizations assigned to a user. Basis consultants are responsible for maintaining the user master record and assigning authorizations.

     Standard Clients in SAP :

     In SAP, default it provides  three standard Clients. Those are given as client 000, client 001 and client  066.

• Client 000 :
• We can find this client in the system as soon as we install SAP r/3 software.
• This is called master client.
• It contains a simple organizational structure of a test company and includes parameters for all applications, standard settings, and configurations for the control of standard transactions.
• No changes should be made in this client.
  
• Client 001 :
  
  
• This client is a copy of the 000 client. 
• This client's settings are client-independent if it is configured or customized.
• Client 066 :
• This is called early watch client.
• The SAP early watch alert is a diagnosis service, Alert may contain Performance issue, average response time, current system load, Database administration.. etc.

Client Creation :

Step 1) Execute T-Code SCC4. Then make it as changeable. Now click on new entries. 

Step 2) Enter basic details as given below,

• Client number & description.
• City to which client Belongs (etc, NY-New York).
• Give logical system for that respective client by creating new one like as below : 
• Logical system may be <SID>CLNT<Client Number>.
• While new connection logical connection is created by Transaction code BD54 and syntax of name is <SID>CLNT<client no>.
•   E.g. PRDCLNT900 Logical System for client 900.
• Std Currency
             E.g. IND
• Client roles may be Customizing, Demo, Training/Education, Production.

• Enter your client specific permission as per requirement,
  FOR "Changes and Transports for client-specific objects"Options are given as,
• Changes without automatic recording.
• Automatic recording of changes.
• No changes allowed.
• Changes without automatic recording, no transport allowed. 
• Settings related to "cross-client object changes"
  Options are given as,
•  Changes to repository and cross-client customizing objects.
• No changes to cross-client customizing objects.
• No changes to repository objects.
• No changes to repository and cross-client customizing objects.
  Note :  1. “Repository objects" are the programs, data structures.. etc.
              2. Customizing which is reflected to other client's i.e. throughout the system is called as “cross client customizing”.
• You need to set CATT and eCATT restrictions.
• And also need to some other restrictions as
• Locked due to client copy.
• Protection against SAP upgrade.

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