Which component of SAP HANA is responsible for data recovery during a failure?

The Transaction Log is the component of SAP HANA responsible for data recovery during a failure. This log records all changes made to the data in real-time, which allows for the recovery of the database to a consistent state in the event of a system failure. When a failure occurs, the Transaction Log contains a record of all transactions that were committed prior to the failure. SAP HANA can use this log to replay the transactions and restore data to the last known good state, ensuring minimal data loss.

The importance of the Transaction Log lies in its continuous capture of data modifications, which is crucial for maintaining data integrity and consistency, especially in environments that require high availability and reliability. Thus, it is the primary mechanism for recovery scenarios, showcasing its critical role in the overall architecture of SAP HANA. Other components like the Backup Catalog, Master Name Server, and Data Volume play different roles within the SAP HANA ecosystem, but it is the Transaction Log that directly enables effective recovery processes.