SAP BASIS NOTES -2

SAP Landscape (3 system landscape)

How SAP systems are arranged

Basis guy can accesses Development, Quality and Production boxes.

 -  Each box will have a system ID i.e. (SID NO)
 -  In Production box we have only one client (No changes are allowed in production box)
 -  In Development box we have three clients
 -  In Quality we have two clients
 -  All the changes are done in only in Development box
 -  Only testing is done in Quality box
 -  Changes done in Development box should be moved to quality box and get tested and finally it is transformed to production box.
 -  End user have accesses to only production box and very few end users will have accesses to separate training box.

 -  SAND box is used only for R&D purpose. Whatever changes you do in SAND box will not be          transported out of the box i.e. the changes are stored under $TEMP (local server only).
 -  Training box is used by end users for training purpose.
 -  Both SAND and Training box will have the exactly the data as production box.


Development Box
    -    MAST
    -    CUST
    -    SAND
  MAST
  000 001 066 – Clients
  000 to 999 client number names

Type of Changes in Development box
                 In SAP there are only two types of changes.             
                               Workbench change: T.C. is SE09               
                               Customizing Change: T.C. is SE10

Workbench Change: changes made to the default values provided by the SAP in the tables is called workbench change.
Customizing Change: is a change which a totally new change in a system.ex. creating a new program or modifying structure of a program.

Transaction code SE01 = SE09 + SE10

  -    What ever workbench changes are transported using the transport layer ‘SAP’
  -    Customizing transport layer Z<SID>
  -    Anything starting with Z in SAP it’s a customizing change.
  -    In SAP there will be always one export and ‘N’ number of inputs.
        Ratio of export to imports is E:I; 1:N
  -    In three system landscape one export and two imports.
  -    Data moved out of development box is called as export
  -    Data pulled into quality and production box is called as import.
  -    The process is called as transportation

CTD:  is a physical location which has to be configured at the time of installation.
   -    CTD in most cases is configured in development box.
   -    Client number and user name will be same in all boxes


MAST Client                     000                       001                     066   
                                   Master Client        Backup Client         Early watch

                                     Client                User ID                   Password
                                      000                  sap*                        06071992
                                      001                  ddic                        19920706
                                      066                  early watch             surpass/support

These all are SAP client user ID, Client and Password.

-    6th July 1992 when SAP moved from two Tier architecture to three Tier architecture.
-    R/2 is Mainframe
-    R/3 SAP

- Basis guys will have accesses to DDIC only.
- Initally all newly created client use dummy i.e. it will not have any data.
- We have to do a client copy in order to populate the data in the newly created client. This process is called as client copy.
- In order to login into a newly created client should use user ID sap* password is pass.
- ddic is also called as god like user.
- Early watch is a user ID is used by SAP AG people for trouble shoots (ISDN line and router configuration  is require for early watch).

3 Tier + 3 system landscape (SAP-model)

Multi System Landscape

 Will update soon... Check next post...