Changing the Data Synchronize Model of Primary/Standby DB Instances

Function

This API is used to change the data synchronize model of primary/standby DB instances based on service requirements.

Before calling an API, you need to understand the API in Authentication.
Before calling this API, obtain the required region and endpoint.

Constraints

This API is supported for MySQL only.
This API is supported for primary/standby DB instances only.
The synchronize model cannot be changed if the DB instance is in any of the following statuses: creating, upgrading, changing instance class, creating users, or deleting users.

URI

URI format
PUT https://{Endpoint}/v3/{project_id}/instances/{instance_id}/failover/mode

Parameter description

**Table 1** Parameter description
Name	Mandatory	Description
project_id	Yes	Specifies the project ID of a tenant in a region. For details about how to obtain the project ID, see Obtaining a Project ID.
instance_id	Yes	Specifies the DB instance ID.

Request

Parameter description

**Table 2** Parameter description
Name	Mandatory	Type	Description
mode	Yes	String	Specifies the synchronize model. For MySQL, the value can be any of the following: async: asynchronous semisync: semi-synchronous

Request example
```
{
    "mode": "semisync"
}
```

Response

Normal response

Name	Description
workflowId	Indicates the task ID.
instanceId	Indicates the DB instance ID.
replicationMode	Indicates the replication mode.

Example normal response

{
    "instanceId": "c8a7d0abe94840dda99bc437e9442982in01",
    "replicationMode": "semisync",
    "workflowId": "7b55d6ca-dc8e-4844-a9da-6c53a1506db3"
}