Once the system replication is configured properly, each HANA internal process (nameserver, indexserver etc) connects to its counterpart on the secondary site, and all logged changes in the primary location are replicated to secondary site continuously through persisted redo logs. ![]() So in case of a failover, the secondary site will be able to take over without even performing a HANA DB (re)start and will work as primary DB straightaway. In this method, all data is replicated to the secondary site and data is pre-loaded into memory on the secondary site which helps to reduce the recovery time objective (RTO) significantly. System Replication is a standard SAP HANA feature. SAP HANA System Replication is a reliable high availability and disaster recovery solution that provides continuous synchronization of a HANA database to a secondary location either in the same data center or remote site.
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