What storage method is employed by SAP MDG in flex mode for holding active data?

The storage method employed by SAP MDG in flex mode for holding active data is indeed the use of tables as defined in the SAP MDG data model. In this context, flex mode refers to the approach where a business can customize its master data governance processes and integrate different data sources as needed.

Using tables defined in the SAP MDG data model allows for structured organization and efficient retrieval of active data. This method ensures that data is managed centrally within the integrated framework of the system, allowing for comprehensive validation, governance, and observation of data changes. This kind of structured storage facilitates easier data management and enhances the overall data quality governance processes by adhering to the consistent definitions and rules laid out in the MDG data model.

In comparison, temporary files are typically used for short-term data processing but are not suitable for long-term active data storage. Memory caches are more for performance optimization and quick access, while external databases involve additional complexity and integration challenges that may not align with the immediate needs of active data in flex mode. Therefore, leveraging tables as defined in the SAP MDG data model is the optimal method for storing and managing active data effectively.