Is the RDS instance automatically recovered after the top-up (recharge) if the RDS resources are suspended for arrears?

If the RDS instance is past due, its status is turned into "In arrears". Upon renewal by the users, the RDS instance comes into service in no time.

Does the system send renewal notice?

After you enable the RDS instance, you receive relevant SMS notifications before the instance is due.

How is the public network IP disposed of after arrears?

You are unable to access the public network IP after arrears. Upon renewal, access to public network IP resumes.

Does the RDS support unconditional refunding within 7 days?

The RDS database supports refunding within 7 days, rather than full refunding.

Refund amount =(remaining days of the contract /total days of the contract )× instance purchase amount.

In the purchase of resources via discount activities or vouchers, the voucher is not returned, and the qualification for the activities is not reserved after refunding.

When buying RDS, choose 500G of disk space, does it mean that the master and the slave occupy 500G each?

If the RDS with one master and one slave has a disk interface of 500, then each master and slave occupies 500G.