Scaling Up a Replica Set Instance

Precautions

• Each replica set instance can be scaled up a maximum of eight times.
• Storage space can only be scaled up. It cannot be scaled down.
• If you scale up a DB instance with disks encrypted, the expanded storage space will be encrypted using the original encryption key.
• An instance cannot be scaled up if it is in any of the following statuses:
  • Creating
  • Changing instance class
  • Adding node
  • Deleting node
  • Upgrading minor version
  • Switchover in progress
• During scaling, services will not be interrupted, and the storage type cannot be changed.

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 Document Database Service to go to the DDS console.
4. On the Instances page, locate the replica set instance and choose More > Scale Storage Space in the Operation column.

   Alternatively, on the Instances page, click the name of the replica set instance. In the Storage Space area on the Basic Information page, click Scale.

5. On the displayed page, specify the desired amount of space to be added and click Next.

   Select at least 10 GB each time you scale up the storage, and the storage size must be multiples of 10 GB. If the instance has fewer than 8 vCPUs, the maximum storage that can be scaled up to is 5,000 GB. If the instance has 8 or more vCPUs, the maximum storage that can be scaled up to is 10,000 GB.

6. On the displayed page, confirm the storage space.
   • If you need to modify your settings, click Previous to go back to the page for you to specify details.
   • If you do not need to modify the specifications, click Submit to scale up the storage space.

7. Check the results.
   • This process takes about 3 to 5 minutes. The status of the DB instance in the instance list is Scaling up.
   • In the upper right corner of the instance list, click to refresh the list. The instance status changes to Available.
   • In the Storage Space area on the Basic Information page, check whether the scaling up is successful.