Configuring SAP HANA System Replication between a primary and secondary site involves several steps. Here is an overview of the process:

1. Prerequisites:
   • Ensure that you have a fully installed and configured SAP HANA system on both the primary and secondary sites.
   • Make sure the network connectivity is established between the primary and secondary sites, including the necessary ports for HANA communication.
2. Enable System Replication:
   • On the primary site, open the SAP HANA Cockpit or SAP HANA Studio.
   • Connect to the primary HANA instance as a user with administrative privileges.
   • Navigate to the “System Replication” section and enable the system replication feature.
3. Configure the Primary Site:
   • Set the replication mode to “sync” or “async” based on your requirements.
   • Define the secondary site and specify the connection details (IP address, port, etc.) of the secondary HANA instance.
   • Configure the replication parameters like the replication mode, log retention, etc.
   • Save the configuration and start the replication process on the primary site.
4. Prepare the Secondary Site:
   • Install and configure a new SAP HANA system on the secondary site if it’s not already done.
   • Ensure that the secondary site has the same hardware resources and HANA version as the primary site.
   • Configure the network settings and ensure that the secondary site can communicate with the primary site.
5. Establish the Initial Data Copy:
   • Initiate the initial data replication from the primary site to the secondary site.
   • This process involves copying the data from the primary database to the secondary database to synchronize them.
   • Monitor the data copy process and ensure it completes successfully.
6. Test the Replication:
   • Once the initial data copy is complete, verify that the data is consistent between the primary and secondary sites.
   • Perform tests and checks to ensure that the replication is working as expected.
   • Validate that the secondary site is in a synchronized state with the primary site.
7. Monitor and Maintain:
   • Set up monitoring tools to track the replication status and performance.
   • Regularly monitor the replication processes, log files, and system alerts.
   • Perform periodic checks to ensure the replication is functioning correctly.