Function

This API is used to modify DB instance specifications.

Services will be interrupted for 5 to 10 minutes when you modify DB instance specifications. Exercise caution when performing this operation.

Constraints

• This API supports only pay-per-use DB instances.
• The new specifications cannot be the same as the original specifications.
• Specifications can be modified only when the DB instance status is normal.
• This API can only be used to modify specifications within the same series.

  The specification series includes general-purpose (s6), enhanced (c3), and enhanced II (c6).

  Example:

  • dds.mongodb.s6.large.4.mongos and dds.mongodb.s6.medium.4.mongos have the same specifications.
  • dds.mongodb.s6.large.4.mongos and dds.mongodb.c3.large.4.mongos are not of the same specifications.

URI

• URI format

  POST /v3/{project_id}/instances/{instance_id}/resize

• Parameter description

  Table 1 Parameter description

  Name	Mandatory	Description
  project_id	Yes	Specifies the project ID of a tenant in a region.
  instance_id	Yes	Specifies the DB instance ID.

Requests

• Parameter description

  Table 2 Parameter description

  Name	Mandatory	Type	Description
  resize	Yes	Object	Specifies the specification information. For more information, see Table 3.

  Table 3 resize field data structure description

  Name	Mandatory	Type	Description
  target_type	No	String	Specifies the object type: This parameter is mandatory for a cluster instance. When the mongos node specifications are to be modified, the value is mongos. When the shard nodes specifications are to be modified, the value is shard. This parameter is not transferred for replica set and single node instances.
  target_id	Yes	String	Specifies the ID of the DB instance or node whose specifications are to be modified. If the mongos node specifications are to be modified, the value is mongos node ID. If the shard nodes specifications are to be modified, the value is shard node ID. For a replica set instance, the value is the DB instance ID. For a single node instance, the value is the DB instance ID.
  target_spec_code	Yes	String	Specifies the resource specification code of the new specification. For details about how to obtain the value, see the response values of flavors.spec_code in Querying All DB Instance Specifications.

• Request header

  POST https://DDS endpoint/v3/{project_id}/instances/{instance_id}/resize

• Example request
  Modify the mongos specifications in a cluster instance.

  {
    "resize": {
      "target_type": "mongos",
      "target_id": "a742c13a284949adad177672e8a0f01cno02",
      "target_spec_code": "dds.c3.large.4.mongos"
    }
  }

  Modify the shard specifications in a cluster instance.

  {
    "resize": {
      "target_type": "shard",
      "target_id": "aeeb40a704904977ad78993d138ec942gr02",
      "target_spec_code": "dds.c3.large.4.shard"
    }
  }

  Modify specifications of a replica set or a single node instance.

  {
    "resize": {
      "target_id": "aeeb40a704904977ad78993d138ec942in02",
      "target_spec_code": "dds.c3.medium.4.repset"
    }
  }

Responses

• Parameter description

  Table 4 Parameter description

  Name	Type	Description
  job_id	String	Indicates the task ID.

• Response example

  {
      "job_id": "3711e2ad-5787-49bc-a47f-3f0b066af9f5"
  }

Status Code

For more information, see Status Code.

Error Code

For more information, see Error Code.