Which SAP HANA feature ensures that committed data is NOT lost if there is a power failure?

Persisted redo logs play a crucial role in ensuring that committed data remains intact during unexpected events such as power failures. When a transaction is committed in SAP HANA, the changes made to the database are recorded in the redo logs. This process guarantees that there’s a complete record of all modifications, allowing the system to recover its state by replaying these logs after a crash or power loss.

By implementing persisted redo logs, SAP HANA effectively maintains data integrity and durability, aligning with the ACID properties of database transactions. This means that even if the system loses power unexpectedly, the committed transactions can be restored, preventing any data loss.

While features like automatic savepoints, database replication, and memory snapshots also enhance data management and recovery processes, they address different aspects of data security and recovery. Automatic savepoints can help in reducing recovery time but do not specifically ensure the retention of committed data during failures. Database replication offers a backup strategy but relies on a second instance to retain data, which is not directly linked to power failures of the primary instance. Memory snapshots focus on capturing the current state of in-memory data but may not guarantee the protection of committed transactions in the event of a power failure. Thus, persisted redo logs are central to preserving the integrity