Expanding the Capacity of a Replication Pair

Function

This API is used to expand the capacity of the two disks in a replication pair.

Constraints and Limitations

• status of the replication pair must be available, protected, or error-extending.
• status of disks in the replication pair is available or in-use.
• If the billing mode of the disks in the replication pair is yearly/monthly, capacity expansion is not supported. If you want to increase the capacity of disks in the replication pair, delete the replication pair, expand the capacity of the production site disk, and then use the disk to create a replication pair.

• When the disks in a replication pair are not shared

  Capacity expansion is supported even if the disks in the replication pair are in the in-use state.

• When the disks in a replication pair are shared

  The replication pair capacity cannot be expanded online if the disks are in the in-use state.

URI

• URI format

  POST /v1/{project_id}/replications/{replication_id}/action

• Parameter description

  Parameter	Mandatory	Type	Description
  project_id	Yes	String	Specifies the project ID. For details about how to obtain the project ID, see Obtaining a Project ID.
  replication_id	Yes	String	Specifies the ID of a replication pair. You can obtain this value by calling the API described in Querying Replication Pairs.

Request

• Parameter description

  Parameter	Mandatory	Type	Description
  extend-replication	Yes	Object	Expands disk capacity. For details, see Table 1.

  Table 1 extend-replication field description

  Parameter	Mandatory	Type	Description
  new_size	Yes	Integer	Specifies the disk capacity after expansion in a replication pair. Unit: GB NOTE: If the value has a decimal point, the system takes the integer before the decimal point by default.

• Example request
  POST https://{Endpoint}/v1/{project_id}/replications/b93bc1c4-67ee-45a1-bc8a-d022fdd28811/action

  {  
      "extend-replication": { 
          "new_size": 10 
      } 
  }

Response

• Parameter description

  Parameter	Type	Description
  job_id	String	Specifies the job ID. This is a returned parameter when the asynchronous API command is issued successfully. For details about the task execution result, see the description in Querying the Job Status.

• Example response

  { 
     "job_id": "0000000011db92d34587db9d20df32ch" 
   }

  Or

  { 
       "error": { 
           "message": "XXXX",  
           "code": "XXX" 
       } 
   }

  In this example, error represents a general error, including badrequest (shown below) and itemNotFound.

  { 
       "badrequest": { 
           "message": "XXXX",  
           "code": "XXX" 
       } 
   }

Returned Values

• Normal

  Returned Value	Description
  200	The server has accepted the request.

• Abnormal

  Returned Value	Description
  400 Bad Request	The server failed to process the request.
  401 Unauthorized	You must enter a username and the password to access the requested page.
  403 Forbidden	You are forbidden to access the requested page.
  404 Not Found	The server could not find the requested page.
  405 Method Not Allowed	You are not allowed to use the method specified in the request.
  406 Not Acceptable	The response generated by the server could not be accepted by the client.
  407 Proxy Authentication Required	You must use the proxy server for authentication so that the request can be processed.
  408 Request Timeout	The request timed out.
  409 Conflict	The request could not be processed due to a conflict.
  500 Internal Server Error	Failed to complete the request because of a service error.
  501 Not Implemented	Failed to complete the request because the server does not support the requested function.
  502 Bad Gateway	Failed to complete the request because the server receives an invalid response from an upstream server.
  503 Service Unavailable	Failed to complete the request because the system is unavailable.
  504 Gateway Timeout	A gateway timeout error occurred.