Why is it important for the SAP HANA database system and SAP NetWeaver AS ABAP system to have different System IDs (SIDs)?

Having different System IDs (SIDs) for the SAP HANA database system and the SAP NetWeaver AS ABAP system is crucial to prevent data collisions and ensure the integrity of the systems. Each system in an integrated landscape must maintain its own identity to avoid conflicts, especially when multiple systems are interacting with one another.

When systems share the same SID, the risk of data overlap increases, which can lead to confusion and potential corruption of data. This situation can be particularly problematic in environments where data is shared or synchronized across systems, as it makes it difficult to track the origin of data and enforce consistency. Separate SIDs help establish clear boundaries between the two systems, ensuring that data transactions, user sessions, and operational logs remain distinct and manageable.

This practice contributes to the overall stability and reliability of the IT landscape, making it easier for administrators to maintain, troubleshoot, and optimize each system individually. Maintaining a clear identification for both systems ultimately enhances the overall integrity of data and processes within the SAP environment.