doc-exports/docs/rds/api-ref/en-us_topic_0034943367.html

Changing DB Instance Volume

Function

This API is used to change the DB instance volume.

URI

• URI format

  PATH: /rds/v1/{project_id}/instances/{instanceId}/action

  Method: POST

• Parameter description

  Table 1 Parameter description

  Name	Mandatory	Description
  project_id	Yes	Specifies the project ID of a tenant in a region.
  instanceId	Yes	Specifies the primary node ID of the DB instance. NOTE: This field is not the DB instance ID. You are advised to use API v3 and the DB instance ID to perform related operations.

• Restrictions
  1. The adjusted volume size must be greater than the original one and the desired volume size must be a multiple of 10.
  2. The sizes of the primary and standby DB instances are the same. When you scale the primary DB instance, its standby DB instance is also scaled.
  3. The DB instances can be scaled when they are in the Available state.

Request

• Parameter description

  Table 2 Parameter description

  Name	Type	Description
  resize	Dictionary data structure. For details, see Table 3.	Specifies the information about the request parameter volume.

  Table 3 resize field data structure description

  Name	Type	Description
  volume	Dictionary data structure. For details, see Table 4.	Specifies the information about the request parameter size.

  Table 4 volume field data structure description

  Name	Type	Description
  size	Int	Specifies the volume size after scaling up. The value must a multiple of 10. Its value range is from 50 GB to 4000 GB. NOTICE: The adjusted volume size of must be greater than or equal to that of the original volume size.

• Request example

  {    
  "resize": {
          "volume": {
              "size": 400 
          }
      }
  }

Normal Response

• Parameter description

  Table 5 Parameter description

  Name	Type	Description
  extendparam	Dictionary data structure. For details, see Table 6.	Indicates the returned extendparam key-value pair.

  Table 6 extendparam field data structure description

  Name	Type	Description
  jobs	List data structure. For details, see Table 7.	Indicates the returned jobs parameter information.

  Table 7 jobs field data structure description

  Name	Type	Description
  id	String	Indicates the task ID.

• Response example

  {
      "extendparam": {
          "jobs": [
              {
                  "id": "2b414788-a600-4883-a023-90e2eb0ea227"
              }
          ]
      }
  }

Abnormal Response

For details, see Abnormal Request Results.

Parent topic: DB Instance Management