Expanding a Graph

This API is used to expand multiple secondary nodes dynamically. The expanded secondary nodes can process read requests, improving read performance.

This API is not supported by graphs of the 10,000-edge and 10-billion-edge types.

POST /v1.0/{project_id}/graphs/{graph_id}/expand

**Table 1** URI parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID, which is used for resource isolation. For details, see Obtaining a Project ID.
graph_id	Yes	String	Graph ID

**Table 2** Parameters in the request header
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	User token. The token can be obtained by calling the IAM API. (The token is the value of X-Subject-Token in the response header.)

**Table 3** Request body parameters
Parameter	Mandatory	Type	Description
expand	Yes	ReplicationReq object	expand is an object.

**Table 4** ReplicationReq
Parameter	Mandatory	Type	Description
replication	Yes	String	Number of new nodes to expand

Status code: 200

**Table 5** Response body parameters
Parameter	Type	Description
errorMessage	String	System prompt. If execution succeeds, this parameter may be left blank. If execution fails, this parameter is used to display the error message.
errorCode	String	System prompt. If execution succeeds, this parameter may be left blank. If execution fails, this parameter is used to display the error code.
jobId	String	ID of the expansion job. This parameter is left blank when the request fails. NOTE: You can view the job execution status and obtain the return result by querying the job ID. For details, see Task Center APIs.

POST http://Endpoint/v1.0/{project_id}/graphs/{graph_id}/expand

{
  "expand " : {
    "replication" : "1"
  }
}

Status code: 200

{
  "jobId" : "ff8080816025a0a1016025a5a2700007"
}

Status code: 400

Bad Request

{
  "errorCode" : "GES.7015",
  "errorMessage" : "The graph is not running or stopped."
}

Status Code	Description
200	OK
400	Bad Request

Parent topic: Graph Management APIs

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