Help Center/ Distributed Database Middleware/ API Reference (Kuala Lumpur Region)/ DDM Instance Management/ Modifying the Read Policy of the Associated DB Instance
Updated on 2022-08-17 GMT+08:00
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Modifying the Read Policy of the Associated DB Instance

Function

This API is used to modify the read policy of the DB instance associated with the DDM instance.

Constraints

Make sure that the associated RDS DB instance is available and not undergoing other operations.

URI

PUT /v2/{project_id}/instances/{instance_id}/action/read-write-strategy
Table 1 Path parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Project ID of a tenant in a region

instance_id

Yes

String

DDM instance ID

Request Parameters

Table 2 Request header parameters

Parameter

Mandatory

Type

Description

X-Auth-Token

Yes

String

User token

It can be obtained by calling the IAM API (value of X-Subject-Token in the response header).
Table 3 Request body parameters

Parameter

Mandatory

Type

Description

read_weight

Yes

Map<String, String>

Read weights of the primary DB instance and its read replicas

Response Parameters

Status code: 200

Table 4 Response body parameters

Parameter

Type

Description

success

Boolean

Task execution result

instance_id

String

DDM instance ID

Status code: 400

Table 5 Response body parameters

Parameter

Type

Description

errCode

String

Service error code

externalMessage

String

Error message

Status code: 500

Table 6 Response body parameters

Parameter

Type

Description

errCode

String

Service error code

externalMessage

String

Error message

Example Request

POST https://{endpoint}/v2/{project_id}/instances/{instance_id}/action/read-write-strategy

{
"read_weight":{"395298ae6fb9496d95939ed556474983in01": 60, "38ef52c365a14b7caeb7333137900e96in01": 50}
}

Example Response

Status code: 200

ok

{
    "success": true,
    "instance_id": "46aa2a7d7e8c4b23a9193639ed4950f5in09"
}

Status code: 400

bad request

{
  "externalMessage" : "Parameter error.",
  "errCode" : "DBS.280001"
}

Status code: 500

server error

{
  "externalMessage" : "Parameter error.",
  "errCode" : "DBS.280001"
}

Status Codes

Status Code

Description

200

ok

400

bad request

500

server error

Error Codes

For details, see Error Codes.

Parent topic: DDM Instance Management