How does SAP HANA backup ensure data persistence?

The method through which SAP HANA ensures data persistence is primarily tied to the concept of savepoints. Savepoints are specific moments in time where the state of the database is captured and persisted to disk. By performing savepoints every five minutes, SAP HANA effectively allows the system to maintain a consistent and recoverable state of the database. This mechanism is critical for ensuring that in the event of a failure, the database can be restored to the last savepoint, minimizing data loss and enhancing reliability.

Regular savepoints also contribute to performance optimization by allowing for transactions to be committed without waiting for all data to be written to disk immediately, thereby balancing durability with efficiency. Thus, this approach directly underpins the system's ability to protect and, if necessary, recover data, making it the method through which SAP HANA guarantees data persistence.