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Reviewed-by: Wagner, Fabian <fabian.wagner@t-systems.com>
Co-authored-by: wangdengke2 <wangdengke2@huawei.com>
Co-committed-by: wangdengke2 <wangdengke2@huawei.com>
2025-11-24 12:07:53 +00:00

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Changing a Storage Type

Scenarios

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

Constraints

Table 1 Constraints

Phase

Constraints

Before the change
  • The storage type of an instance can be changed only when the instance is in the Available state.
  • Changing the storage type may affect storage performance, so the storage type should be changed during off-peak hours.
  • If the storage type of a read replica is different from that of its associated DB instance, the data synchronization may be affected. Ensure that the storage type of the read replica is the same as or faster than that of the primary DB instance.

During the change

Changing a storage type takes several minutes or even hours, depending on the throughput, storage space, original storage type, and new storage type.

After the change

In rare cases, a storage type may fail to be changed due to a backend issue. If this happens, try again later.
Table 2 Storage types

Instance Type

Original Storage Type

Target Storage Type
  • Primary/Standby
  • Read Replica
  • Single

Cloud SSD

Extreme SSD

Ultra-high I/O

Cloud SSD or extreme SSD

Procedure

  1. Log in to the management console.
  2. Click in the upper left corner and select a region and a project.
  3. Click Service List. Under Database, click Relational Database Service. The RDS console is displayed.
  4. On the Instances page, locate a DB instance using cloud SSD 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 Extreme SSD for Storage Type and click Next.
  6. Confirm the new storage type. Click Submit.
  7. Check the results.

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

Parent topic: Instance Modifications