RDS uses hot standby, so if a physical server fails, the service is switched over in seconds without interruptions to application services.
The data in RDS server is built on RAID, and the data backup is stored on OSS.
RDS offers an automatic backup mechanism. You can set a backup schedule or initiate a temporary backup at any time.
Data can be recovered from a backup. Generally, data can be recovered within 7 days to a temporary RDS instance. After the data is verified, the data can be migrated back to the master RDS instance.