In many SAP HANA landscapes, System Replication is implemented to enable fast failover and improve availability.
However, during real incidents a confusing situation is frequently observed:
A takeover is successful, the secondary system becomes primary, yet applications still cannot connect.
This often leads to the assumption that System Replication did not work correctly.
The purpose of this article is not to provide configuration advice.
Instead, it consolidates official SAP documentation to clarify the documented scope of SAP HANA System Replication and how it interacts with high-availability infrastructure components.
By separating database role handling from client access routing, the article explains why a technically successful takeover and failed client connectivity can occur at the same time, without indicating a replication malfunction.
The goal is to align operational expectations with the documented architecture and support clearer troubleshooting during incidents.
In many SAP HANA landscapes, System Replication is implemented to enable fast failover and improve availability.However, during real incidents a confusing situation is frequently observed:A takeover is successful, the secondary system becomes primary, yet applications still cannot connect.This often leads to the assumption that System Replication did not work correctly.The purpose of this article is not to provide configuration advice.Instead, it consolidates official SAP documentation to clarify the documented scope of SAP HANA System Replication and how it interacts with high-availability infrastructure components.By separating database role handling from client access routing, the article explains why a technically successful takeover and failed client connectivity can occur at the same time, without indicating a replication malfunction.The goal is to align operational expectations with the documented architecture and support clearer troubleshooting during incidents. Read More Technology Blog Posts by SAP articles
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