IKM When Staging Area is Different from the Target Server

1. Execute Set-Oriented SELECT Statement:
• The IKM executes a single set-oriented SELECT statement.
• This statement applies declarative rules to all C$ tables and tables located in the source or staging area (e.g., D in the figure).
• This results in the generation of a result set.
2. Load Data into the Target Datastore:
• The IKM loads the generated result set into the target datastore.
• The data is loaded based on the defined strategy, which can either be:
• Append: Simply adding the data to the target table.
• Incremental Update: Updating existing records in the target based on certain criteria.

Limitations of This Architecture:

1. No CKM for Data Integrity Audit:
• CKM (Check Knowledge Module) cannot be used to perform a data integrity audit on the data being processed. This means you cannot easily check for or cleanse errors in the data before it is loaded into the target datastore.
2. Potential Performance Issues:
• Since data needs to be extracted from the staging area before it can be loaded into the target, this process may result in performance issues, especially when dealing with large volumes of data. The extraction process can add additional overhead and slow down the data load process.