How In-Memory Data & Persistent Storage works in HANA ?



The SAP HANA database holds the bulk of its data in memory for maximum performance, but still uses
persistent storage to provide a fallback in case of failure.

During normal operation of the database, data is automatically saved from memory to disk at regular
savepoints.

Additionally, all data changes are captured in the log. The log is saved from memory to disk after each
committed database transaction.

After a power failure, the database can be restarted like any disk-based database and returned to its
last consistent state by replaying the log since the last savepoint.




Tags: SAP HANA Data Fallback, SAP HANA Persistent storage , HANA data save points, HANA log is saved from memory to disk after each committed database transaction,

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