Help Center/ GeminiDB/ API Reference/ APIs v3/ Instances/ Changing Specifications of an Instance
Updated on 2025-09-23 GMT+08:00
View PDF

Changing Specifications of an Instance

Function

This API is used to change specifications of an instance.

Services will be interrupted for 5 to 10 minutes when you change specifications of an instance. Exercise caution when performing this operation.

Constraints

This API supports the following instance types:

  • GeminiDB Cassandra
  • GeminiDB Redis

This API can be used to change instance specifications.

The new specifications cannot be the same as the original specifications.

Specifications can be modified only when the instance status is normal.

If specifications cannot meet the requirements for running the instance, the specifications cannot be changed.

URI

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

Table 1 URI parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Project ID of a tenant in a region. To obtain this value, see Obtaining a Project ID.

instance_id

Yes

String

Instance ID.

Request Parameters

Table 2 Request header parameter

Parameter

Mandatory

Type

Description

X-Auth-Token

Yes

String

User token.
Table 3 Request body parameters

Parameter

Mandatory

Type

Description

resize

Yes

ResizeInstanceOption object

Target specification information.

is_auto_pay

No

String

Whether the order will be automatically paid after a yearly/monthly instance is created. This parameter does not affect the payment mode of automatic renewal.

  • This parameter is invalid when the instance specifications are scaled down.
  • When the specifications are scaled up, this parameter can be set to:
    • true, indicating that the order is automatically paid from the account.
    • false, indicating that the order is manually paid from the account. The default value is false.
Table 4 ResizeInstanceOption

Parameter

Mandatory

Type

Description

target_spec_code

Yes

String

Target resource specification code.

For the code, see the value of response parameter flavors.spec_code in Querying Instance Specifications.

Response Parameters

Status code: 202

Table 5 Response body parameters

Parameter

Type

Description

job_id

String

Task ID. This parameter is returned only for pay-per-use instances.

order_id

String

Order ID. This parameter is returned only for yearly/monthly instances.

Example Request

  • URI example 
    PUT https://gaussdb-nosql.eu-west-101.myhuaweicloud.eu/v3/375d8d8fad1f43039e23d3b6c0f60a19/instances/9136fd2a9fcd405ea4674276ce36dae8in06/resize
  • Changing instance specifications to 16 vCPUs and 64 GB 
    {
  "resize" : {
    "target_spec_code" : "geminidb.cassandra.4xlarge.4"
  }
}

Example Response

Status code: 202

Accepted

Example response for a pay-per-use instance:

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

Example response for a yearly/monthly instance:

{
  "order_id" : "CS20070721568OVO9"
}

Status Codes

See Status Codes.

Error Codes

See Error Codes.

Parent topic: Instances