SAP HANA System Replication setup with hdbnsutil

The following steps show how to configure such a system. In this scenario there are two SAP HANA systems: A, B named SiteA & SiteB. This scenario supports a tier 2 secondary with sync replication mode.

Check the Replication prerequisites using below link,
Prerequisites for Configuring SAP HANA System Replication

1. Enable system replication in Primary System.
    Primary System Loggical Name - SiteA

     Login as SIDDM

    cd /usr/sap/<sid>/HDB<instancenr>/exe
    /hdbnsutil -sr_enable --name=SiteA

   To check if the site has been successfully enabled for system replication with hdbnsutil run:
   

    /hdbnsutil -sr_state

2. Stop the tier 2 secondary System
     sapcontrol -nr <instance_number> –function StopSystem HDB or HDB stop

3. Register Secondary System on Primary

hdbnsutil -sr_register --replicationMode=sync --operationMode=logreplay --name=SiteB     --remoteInstance=<instId> --remoteHost=<hostname_of_SiteA>

4. Start the secondary system
sapcontrol -nr <instance_number> –function StopSystem HDB  or  HDB start

To check if the site has been successfully enabled for system replication with hdbnsutil run

/hdbnsutil -sr_state

Also Read,

Disable SAP HANA System Replication with hdbnsutil

Replication Modes of SAP HANA System Replication

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