RDS adopts a hot standby architecture. If the master server fails, services will be failed over in seconds. The entire failover process is transparent to applications.
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, you can migrate the data back to the master RDS instance. For more information, see Backup recovery.