Chapter 1. Overview

Due to the growing demands on availability, one copy of data is not enough.
To ensure business continuity, a reliable and highly available architecture must replicate data across more than just one location. Using multitarget system replication, the primary SAP HANA site can replicate data changes to more than one secondary SAP HANA site. For more information, see SAP HANA Multitarget System Replication.

This document describes how to configure a replication site for disaster recovery using SAP HANA multitarget system replication scale-out cluster, installed as described in Automating SAP HANA Scale-Out System Replication using the RHEL HA Add-On.

The initial setup is as follows:

If the primary fails, the primary switches to secondary site 2 (DC2) and the former primary site 1 (DC1) becomes a secondary site.

When failover occurs, this solution ensures that the configured primary site is switched at the third DR site as well. The configuration after failover is as follows:

The SAP HANA instance on DC3 automatically re-registers to the new primary as long as this instance is up and running during the failover.

This document also describes the example of switching the primary database to the third site.

You must note that further network configuration is required for the connection of the clients to the database. This is not within the scope of this document.

For further information, check the following: