UpdatePolarDBXInstanceNode - PolarDB - Alibaba Cloud Documentation Center

Calls the UpdatePolarDBXInstanceNode operation to change the number of nodes for an instance, including scaling out and scaling in. This request generates a billable order.

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RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.
API: The API that you can call to perform the action.
Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.
Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.
- For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.
- For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.
Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.
Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

polardbx:UpdatePolarDBXInstanceNode

update

*All Resource

*

None

Request parameters

Parameter	Type	Required	Description	Example
RegionId	string	Yes	The region ID.	cn-hangzhou
DBInstanceName	string	Yes	The instance name ID.	pxc-hzjasdyuoo
DbInstanceNodeCount	integer	No	The target number of nodes for the instance. Valid values: 0 to 99.	3
ClientToken	string	No	The client token, which is an arbitrary random string.	FEA5DC20-6D8A-5979-97AA-FC57546ADC20
CNNodeCount	integer	No	The number of compute nodes.	2
DNNodeCount	integer	No	The number of storage nodes.	2
StoragePoolName	string	No
DeleteDNIds	string	No
AddDNSpec	string	No

Response elements

Element	Type	Description	Example
	object
OrderId	string	The order ID generated when the number of instance nodes is changed.	20211103105558
RequestId	string	The request ID.	FEA5DC20-6D8A-5979-97AA-FC57546ADC20

Examples

Success response

JSON format

{
  "OrderId": "20211103105558",
  "RequestId": "FEA5DC20-6D8A-5979-97AA-FC57546ADC20"
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.