Backup: How Is It Different with FRS?
The database's data file is first copied to the FRS storage. The storage serves as FRS's master copy backup. Second, based on the RPO numbers, FRS performs a log backup. Third, FRS performs a database search to identify the modified data blocks.
These data blocks are then applied to the most recent master copy. It brings the data in the master copy near that in the production database. FRS takes a snapshot of the previously constructed MC state before the block-applying operation. In light of the retention period, FRS enables you to recover the database at a specific time.