SAP HANA – High Availability and Disaster Recovery

What is High Availability?

High Availability is a set of methods, engineering practices and design ethics for Business Continuity. This is done by eliminating single points of failure, and providing the ability to rapidly resume operations after a system outage with minimal business loss.

What is Fault & Disaster Recovery? Does HANA support Disaster Recovery?

Fault Recovery is the process of recovering and resuming operations after an outage due to a fault. Disaster Recovery deals with recovering operations after an outage due to a prolonged datacenter or site failure. SAP HANA provides two synchronous solutions that can be used for disaster recovery. One is Storage Replication and second one is System Replication.

SAP HANA provides a range of fault and disaster recovery solutions to achieve High Availability.

SAP HANA has in-memory database. So,  SAP  HANA  must  not  only  worry  itself  with  continuing  the  reliability  of  its data  in  the  incident  of  failures. It has to  resume  operations  with  most  of  that  data  loaded  back  in memory as quickly as possible.

Backups: SAP HANA perseveres two types of data to storage. One is transaction logs; another is data changes in the form of save points. A transaction redo log is used to record a change. A savepoint is a periodic point in time. All the changed data is written to storage in the form of pages.

 

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