RDS uses hot standby, so if a physical server fails, the service is switched over in seconds without interruptions to application services. The entire switching process is transparent to the application.
The data on the ApsaraDB for RDS server is stored on RAID, and backed up on OSS.
ApsaraDB for RDS provides an automatic backup mechanism. You can set a backup schedule or initiate a temporary backup at any time. For more information, see Backup recovery.
You can recover data by selecting a backup set or point in time. Generally, you can recover data from any point in time of the past 7 days to a clone or temporary instance. After the data is verified, migrate the data back to the master RDS instance. For more information, see Backup recovery.