SAP HANA Multitarget System Replication Setup

[ravindrakumartbc]

Hi , I am Setting up HANA Multitarget System Replication Setup. 2 Nodes at Primary site running on Redhat cluster and further 2 nodes running at DR site ( both is different Cluster ) .primary system A in data center 1 replicates data changes to secondary system B in the same data center. Primary system A also replicates data changes to secondary system C in data center 2. Secondary system C is a source system for a further secondary system D located in the same data center with system C.

i am following the below procedure provided by SAP notes.

Example: Configure a SAP HANA Multitarget System Replication - SAP Help Portal

Procedure

1. On primary system A in data center 1:
   1. Create backups.
   2. Enable system replication.
2. On the local secondary system B in data center 1:
   1. Stop the system.
   2. Register it to A.
   3. Start the system.
3. On the remote secondary system C in data center 2:
   1. Stop the system.
   2. Register it to A.
   3. Start the system.
4. On the remote secondary system D in data center 2:

1. Stop the system.
2. Register it to C.
3. Start the system.

any one implemented this solution, My system D is not able to Register with system C. Seems like System D is unable to find active system at C since it is registered as secondary of system B.

Any guidance will be much appreciated.

Thanks in Advance

[amontella96]

hey terrabitconsulting , good that you explained the scenario but can you also attach the error you get?

what's your release+SPS+revision?

cheers!A

[dennispadia · Accepted solution]

Hello Ravindra,
You can use below command to configure your setup.

To register SITE3 as secondary of SITE1, follow below instructions:

SITE3> HDB stop

SITE3> hdbnsutil -sr_register --remoteHost=SITE1 --remoteInstance=03 --replicationMode=async --name=S3 --operationMode=logreplay

SITE3> HDB start

SITE3> hdbnsutil -sr_enable --name=S3

To register SITE4 as secondary of SITE3, follow below instructions:

SITE4> HDB stop

SITE4> hdbnsutil -sr_register --remoteHost=SITE3 --remoteInstance=03 --replicationMode=sync --name=S4 --operationMode=logreplay

SITE4> HDB start