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  Introduction about High Availability in HANA High availability is about minimizing both planned and unplanned downtime.  Planned downtime could be for server patching, while unplanned downtime is caused by a fault in some component that takes the service offline.  The high availability solution has to cost less than the cost of the downtime it avoids, or you are wasting money. To develop a business case for high availability, first understand the costs of the planned downtime that you require to maintain the system, and the cost per hour of unplanned downtime occurring.  If you don’t know these costs, stop and work them out with the business users. HANA high availability needs to provide a high level of performance configured to your company’s exact specifications. Traditionally, companies had to choose between disaster recovery, which used offsite replication, and high availability, with redundant onsite replication. DR was more resilient, since it could withstand failure of the pri