ApsaraDB for Redis supports on-demand instance scaling to optimize resource usage and data management in a cost-effective manner.
You can upgrade or downgrade an ApsaraDB for Redis instance at your convenience. For more information, see Modify instance configurations.
The instance is billed based on the specifications that are used when the system generates a billing order.
You can change the configurations of a subscription instance before and after the instance expires. Higher specifications are charged more than lower specifications. For example, the price of an 8 GB read/write splitting instance with five read replicas is higher than that of a 16 GB cluster instance. If you want to switch a 16 GB cluster instance to an 8 GB read/write splitting instance with five read replicas, you must upgrade the instance.
- Expired instances
If you upgrade or downgrade an instance during the renewal process, the instance is billed based on the new specifications and subscription period.
- Upgrade or downgrade an instance before expiration
Table 1. Fees for upgrading or downgrading unexpired instances Scaling method Billing Upgrade Total fees for upgrading an instance = (Daily fees of the instance after upgrade - Daily fees of the instance before upgrade) × (Number of days between the subscription expiration date and the upgrade date) Downgrade Downgrade refunds = (Daily fees of the instance before downgrade - Daily fee of the instance after downgrade) × (Number of days between the subscription expiration date and the downgrade date)
If the remaining days before service expiration are less than 365 days, the fees are incurred based on the monthly subscription price. If the remaining days are greater than or equal to 365 days, the fees are incurred based on the annual subscription price.
Upgrade or downgrade instances of different editions
- You can upgrade an ApsaraDB for Redis instance from Community Edition to Enhanced Edition.
- You cannot downgrade an ApsaraDB for Redis instance from Enhanced Edition to Community Edition.
Upgrade or downgrade Enhanced Edition instances
You cannot switch instances between performance-enhanced series and hybrid storage series.