Updated on 2025-10-24 GMT+08:00

Scaling Up Storage Space

API Description

This API is used to scale up the storage space of a DB instance.

URI

URI format
POST /v3/{project_id}/instances/{instance_id}/enlarge-volume
URI example
https://dds.ap-southeast-1.myhuaweicloud.com/v3/0549b4a43100d4f32f51c01c2fe4acdb/instances/9136fd2a9fcd405ea4674276ce36dae8in02/enlarge-volume

**Table 1** Path parameters
Name	Mandatory	Type	IN	Description
project_id	Yes	string	path	Explanation: Project ID of a tenant in a region. To obtain the project ID, see Obtaining a Project ID. Constraints: N/A Value range: N/A Default value: N/A
instance_id	Yes	string	path	Explanation: Instance ID, which can be obtained by calling the API described in Querying Instances and Details. If you do not have an instance, call the API described in Creating a DB Instance to create one. Constraints: N/A Value range: N/A Default value: N/A

Request Parameters

**Table 2** Request header parameters
Name	Mandatory	Type	IN	Description
X-Auth-Token	Yes	string	header	Definition User token obtained from IAM. For details, see Authentication. Constraints N/A Value range: N/A Default value: N/A

**Table 3** Parameter description
Name	Type	Mandatory	Description
volume	Object	Yes	Explanation: The detailed information about the volume request. For more information, see Table 4. Constraints: N/A Value range: N/A Default value: N/A
is_auto_pay	Boolean	No	Explanation: Whether the order is automatically paid from your account when you scale up the storage of a yearly/monthly DB instance. This parameter does not affect the payment mode of automatic renewal. Constraints: N/A Value range: true: indicates that the order is automatically paid from the account. false: indicates that the order is manually paid from the account. The default value is false. Default value: false

**Table 4** Data structure description of the volume field
Name	Type	Mandatory	Description
group_id	String	No	Explanation: The role ID. Constraints: This parameter is not specified for replica set instances. Value range: For a cluster instance, this parameter is set to the ID of the shard group. Default value: N/A
size	String	Yes	Explanation: The requested disk capacity. The value must be an integer multiple of 10 and greater than the current storage space. Constraints: N/A Value range: In a cluster instance, this parameter indicates the storage space of shard nodes. Value range: 10 GB to 5,000 GB when the shard node has fewer than 8 vCPUs. 10 GB to 10,000 GB when the shard node has 8 or more vCPUs. In a replica set instance, this parameter indicates the disk capacity of the DB instance to be expanded. The value range is from 10 GB to 5,000 GB when the instance has fewer than 8 vCPUs. The value range is from 10 GB to 10,000 GB when the instance has 8 or more vCPUs. In a single node instance, this parameter indicates the disk capacity of the DB instance to be expanded. The value range is from 10 GB to 1,000 GB. Default value: N/A
node_ids	Array of strings	No	Explanation: This parameter is required when the disk capacity of the read replica of a replica set instance is expanded. Only one element can be transferred in the list. Constraints: N/A Value range: N/A Default value: N/A

Example Requests

Scaling up the storage space of a cluster instance to 20 GB

POST //{Endpoint}/v3/054e292c9880d4992f02c0196d3ea468/instances/054e292c9880d4992f02c0196d3ein02/enlarge-volume 
  
 { 
   "volume" : { 
     "group_id" : "1b0c008adbcb495c81a3d5762a02a2abgr02", 
     "size" : 20 
   } 
 }

Scaling up the storage space of a replica set instance to 20 GB

POST //{Endpoint}/v3/054e292c9880d4992f02c0196d3ea468/instances/054e292c9880d4992f02c0196d3ein02/enlarge-volume 
  
 { 
   "volume" : { 
     "size" : 20 
   } 
 }

Scaling up the storage space of a single node instance to 20 GB

POST //{Endpoint}/v3/054e292c9880d4992f02c0196d3ea468/instances/054e292c9880d4992f02c0196d3ein02/enlarge-volume 
  
 { 
   "volume" : { 
     "size" : 20 
   } 
 }

Scaling up the storage space of a read replica in a replica set instance to 20 GB

POST https://{Endpoint}/v3/054e292c9880d4992f02c0196d3ea468/instances/054e292c9880d4992f02c0196d3ein02/enlarge-volume
{
"volume" : {
"size" : 20,
"node_ids" : [ "8f643d252d834a4c916b2db4322f9955in02" ]
}
}

Response Parameters

Parameter description

**Table 5** Parameter description
Name	Type	Mandatory	Description
job_id	String	Yes	Explanation: The task ID. Value range: N/A
order_id	String	No	Explanation: The order ID. This parameter is returned only when the storage capacity of a yearly/monthly DB instance is expanded. Value range: N/A

Example Responses

{
     "job_id" : "04efe8e2-9255-44ae-a98b-d87cae411890" 
}

Status Code

For more information, see Status Code.

Error Code

For more information, see Error Code.

Parent topic: DB Instance Management