Changing the Storage Type

Scenarios

To improve storage performance of your DB instance, you can change the storage type as needed.

Constraints

• To change the 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.
• Changing the storage type may affect storage performance, so the storage type should be changed during off-peak hours.
• Changing the storage type takes several minutes or even hours, depending on the throughput, storage space, original storage type, and new storage type.

Procedure

1. Log in to the management console.
2. Click in the upper left corner and select a region and a project.
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 target DB instance name to go to the Basic Information page. In the DB Information area, click Change next to the Instance Class field.

5. On the displayed page, select a new storage type and click Next.
6. Confirm the storage type.
   • To modify your settings, click Previous.
   • If you do not need to modify your settings, click Submit for pay-per-use DB instances.

     To view the cost incurred by the DB instance class change, choose Billing Center > Billing Dashboard in the upper right corner.

   • For yearly/monthly DB instances:

     Click Pay Now. The storage type can be changed only after the payment is successful.

7. View the change result.

   Return to the Instances page. After a few minutes, click the DB instance name and view its storage type on the displayed Basic Information page to check that the change is successful.