Help Center/ GeminiDB/ API Reference/ APIs v3 (Recommended)/ Disaster Recovery/ Creating Active-Active Instances
Updated on 2025-12-04 GMT+08:00
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Creating Active-Active Instances

Function

This API allows you to create active-active instances in different regions, so that their data can be synchronized.

Constraints

  • Currently, active-active GeminiDB Cassandra instances can be created, but active-active GeminiDB HBase and DynamoDB-Compatible instances cannot.
  • This API can be used only for GeminiDB Cassandra instances with classic storage.
  • Currently, counter tables, TRUNCATE operations, and Lucene indexes cannot be synchronized between active-active instances.

Authorization Information

Each account has permissions to call all APIs, but IAM users must have the required permissions specifically assigned.

  • If you are using role/policy-based authorization, see the required permissions in Permissions and Supported Actions.
  • If you are using identity policy-based authorization, the following identity policy-based permissions are required.

    Action

    Access Level

    Resource Type (*: required)

    Condition Key

    Alias

    Dependencies

    gaussdbfornosql:instance:buildBiactiveRelation

    Write

    instance *
    • g:ResourceTag/<tag-key>
    • g:EnterpriseProjectId

    nosql:instance:buildBiactiveInstance

    -

URI

POST /v3/{project_id}/instances/{instance_id}/dual-active-relationship

Table 1 URI parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Definition

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

Constraints:

N/A

Values:

N/A

Default value:

N/A

instance_id

Yes

String

Definition

Instance ID

Constraints:

N/A

Values:

N/A

Default value:

N/A

Request Parameters

Table 2 Request header parameters

Parameter

Mandatory

Type

Description

X-Auth-Token

Yes

String

Definition

User token

Constraints:

N/A

Values:

N/A

Default value:

N/A
Table 3 Request body parameters

Parameter

Mandatory

Type

Description

destination_region

Yes

String

Definition

Region where a destination instance is located

Constraints:

N/A

Values:

N/A

Default value:

N/A

destination_instance_id

Yes

String

Definition

Destination instance ID

Constraints:

N/A

Values:

N/A

Default value:

N/A

Response Parameters

Status code: 202

Table 4 Response body parameters

Parameter

Type

Description

job_id

String

Definition

Task ID

Values:

N/A

Status code: 400

Table 5 Response body parameters

Parameter

Type

Description

error_code

String

Definition

Error code

Values:

N/A

error_msg

String

Definition

Error message

Values:

N/A

Example Requests

Creating active-active instances

  • URI example 
    POST https://gaussdb-nosql.ap-southeast-1.myhuaweicloud.com/v3/054e292c9880d4992f02c0196d3ea468/instances/a4d8ea2584e047439a667703c0684119in06/dual-active-relationship
{ 
  "destination_region" : "ap-southeast-1", 
  "destination_instance_id" : "a4d8ea2584e047439a667703c0684119in06" 
}

Example Responses

Status code: 202

Successful response

{
  "job_id" : "f85104b5-4a9c-4e0f-9505-fc5409d8f7ae" 
}

Status Codes

For details, see Status Codes.

Error Codes

For details, see Error Codes.

Parent topic: Disaster Recovery