How does HANA recover from a server (host) hardware failure?

SAP offers several complementary solutions, which involve the use of redundant or standby equipment. The main solutions are:

Host Auto-failover: this solution involves adding one or more passive standby hosts to a SAP
HANA system. When one of the active hosts fails, due to a hardware failure for instance, the
standby host automatically takes over the role of the failed host.

System Replication: this solution involves the installation of a fully redundant standby system
and continuous replication of data changes to the standby system. When the primary system fails,
e.g. due to a host-crash, the secondary standby system takes over.


These solutions can be combined, and further combined with traditional backups, which provide additional support for point-in-time recovery in case of data corruption.



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