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Creating a Dummy Source SystemLocate this document in the navigation structure

Context

You use dummy source systems in the development system if you have only connected one source system (SAP or BW system) but have connected several source systems in the target or production system. The dummy source systems reference the connected source system and serve as an alias. All source system specific metadata in BW (including 3.x objects) references the alias. RFCs for the DataSource replication or for activation and use of metadata objects are redirected to the "real" connected source system.

More information: Creating and Transporting Source System-Specific Data Flows

Procedure

  1. In the source system tree in the Data Warehousing Workbench, choose Create in the Source Systems context menu.
  2. In the dialog that appears, choose Dummy for SAP System/SAP NetWeaver BW.
  3. In the next dialog, enter a name and description for the dummy source system.
    Recommendation

    We recommend naming the dummy systems as closely as possible to the target source systems in the target system.

  4. Under Original System of the Dummy, select the connected source system that you want the dummy to reference.
  5. Press Continue.
  6. In the next dialog, decide whether just to activate the dummy source system or to replicate the metadata to the dummy too.

Results

The dummy system can now be used to model source system-specific scenarios. The function for loading data is very limited however.

Full loading processes can only be performed under the following conditions:

  • The structures of the DataSource in the original source system and the source system dummy are identical.

  • The DataSource is active in the dummy and the original system.

  • The DataSource has the the same object type (RSDS or ISFS) in the original and the dummy.

Note

Data can be updated using a data transfer process from the dummy's PSA.

Delta initialization and loading processes cannot be performed. This is due to the following reasons:

  • It is not possible to load different selection conditions in the original and dummy systems. The original system is always used for loading and it only has one init selection.

  • Deltas can only be sent to a BW once. This means that a delta cannot be loaded from the original system and from the dummy system.