Updated on 2025-01-02 GMT+08:00

Changing the Storage Type

Scenarios

If the storage type of your RDS DB instance does not match your workloads, you can change it as needed.

Constraints

  • To change a storage type, contact customer service.
  • The storage type can only be upgraded, but not downgraded.
  • Both ultra-high I/O and cloud SSD can be changed to extreme SSD.
  • If the storage type of a read replica is different from that of its associated DB instance, the data synchronization may be affected. To change the storage type of a DB instance, change that of its read replica (if any) first to ensure that the storage type of the read replica is the same as that of the DB instance.
  • During the storage type change, operations such as changing the instance class and scaling up storage space cannot be performed on the instance.
  • Changing the storage type may affect the disk performance, so change the type during off-peak hours.
  • Changing the storage type may take several minutes, hours, or even days. The time required depends on the throughput, storage space, and original storage type. This operation cannot be paused.
  • In rare cases, the change may fail due to resource problems. If this happens, you are advised to perform the change again.
  • Due to Elastic Volume Service (EVS) constraints, there can be a maximum of 10 disks with their types being changed at the same time. You may have to wait in a queue when you change your storage type.

Procedure

  1. Log in to the management console.
  2. Click in the upper left corner and select a region.
  3. Click in the upper left corner of the page and choose Databases > Relational Database Service.
  4. On the Instances page, locate the target DB instance and choose More > Change Instance Class in the Operation column.

    Alternatively, click the instance name to go to the Overview page. Under Instance Class, click Configure.

  5. On the displayed page, select a new storage type and click Next.

    Figure 1 Changing the storage type

  6. Confirm the new storage type.

    • To modify your settings, click Previous.
    • For pay-per-use DB instances, click Submit.
    • For yearly/monthly DB instances, click Pay Now. The change starts only after the payment is successful.

  7. Check the result.

    Return to the Instances page. After a few minutes, click the instance name and check the new storage type on the displayed Overview page.