Function

This API is used to import distribution information of physical shards in all schemas and use it to create schemas that contain the same physical shards and distribution relationship.

Constraints

Ensure that the selected data nodes are not associated with other DDM instances and no schemas are created.
The selected data nodes have no physical shards with the same name, for example, db_test_0000.
The current DDM instance has no schemas with the same name.

URI

POST /v3/{project_id}/instances/{instance_id}/schema-metadata

**Table 1** Path parameters
Parameter	Type	Mandatory	Description
project_id	String	Yes	Project ID of a tenant in a region
instance_id	String	Yes	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 an IAM API. The value of X-Subject-Token in the response header is the user token.
Content-Type	Yes	String	MIME type of the request body. Value range: application/json application/json;charset=utf-8

**Table 3** Request body parameters
Parameter	Type	Mandatory	Description
compressed_databases_info	String	Yes	Distribution information of physical shards in a schema. This information is compressed and encoded. For the method to obtain the information, see section "Exporting Schema Metadata."
dn_instance	DnInstance	Yes	Data nodes required for creating a schema. The number of data nodes should be consistent with the exported schema metadata and meet the following constraints: The data nodes are not associated with other DDM instances for creating a schema. The data nodes have no physical shards with the same name, for example, db_test_0000. The data nodes must be in the same VPC as your DDM instance and not associated with other DDM instances. The data nodes must be in the Running or Backing up state

**Table 4** DnInstance
Parameter	Type	Mandatory	Description
dn_instance_id	String	Yes	Data node ID
admin_user	String	Yes	Username for accessing the data node
admin_password	String	Yes	Password for accessing the data node

Example Request

Importing schema metadata

POST https://ddm.eu-de.otc.t-systems.com/v3/619d3e78f61b4be68bc5aa0b59edcf7b/instances/1f5c9fd6cd984056ba89c8c87cc03278in09/schema-metadata 
{
	"compressed_databases_info":"H4sIAAAAAAAAAN3cTW/bRhgE4P/Csw7aL4rUtQUKX3wo0lMQCPxYNQJsOjApIIWR/17K1RvDPgQ9...",
	"dn_instance":[
		{
			"dn_instance_id":"91b1272b09364ddeb999f1295bf0506ain01",
			"admin_user":"root",
			"admin_password":"PassWord_234"
		}
	]
}

Response

Normal response
Table 5 Response body parameters
Parameter

Type

Description

instance_id

String

DDM instance ID

instance_name

String

DDM instance name

job_id

String

Task ID

**Table 5** Response body parameters
Parameter	Type	Description
instance_id	String	DDM instance ID
instance_name	String	DDM instance name
job_id	String	Task ID

Normal response example

{
  "job_id":"441d5677-b76a-4dd4-a97a",
  "instance_id":"91b1272b09364ddeb999f1295bf0506ain09",
  "instance_name":"ddm-test-01"
}

Abnormal response
For details, see Abnormal Request Results.

Status Codes

Normal
202
Abnormal
For details, see Status Codes.

Error Codes

For details, see Error Codes.

Importing Schema Metadata (a V3 API)