Show Meta Info Action

Request

GET /api/show_meta_info

Description

Used to display some metadata information

Path parameters

None

Query parameters

• action

  Specify the type of metadata information to be obtained. Currently supports the following:

  • SHOW_DB_SIZE

    Get the data size of the specified database, in bytes.

  • SHOW_HA

    Obtain the playback status of FE metadata logs and the status of electable groups.

Request body

None

Response

• SHOW_DB_SIZE

  {
  	"msg": "success",
  	"code": 0,
  	"data": {
  		"default_cluster:information_schema": 0,
  		"default_cluster:db1": 381
  	},
  	"count": 0
  }

• SHOW_HA

  {
  	"msg": "success",
  	"code": 0,
  	"data": {
  		"can_read": "true",
  		"role": "MASTER",
  		"is_ready": "true",
  		"last_checkpoint_version": "1492",
  		"last_checkpoint_time": "1596465109000",
  		"current_journal_id": "1595",
  		"electable_nodes": "",
  		"observer_nodes": "",
  		"master": "10.81.85.89"
  	},
  	"count": 0
  }

Examples

1. View the data size of each database in the cluster

   GET /api/show_meta_info?action=show_db_size
   
   Response:
   {
   	"msg": "success",
   	"code": 0,
   	"data": {
   		"default_cluster:information_schema": 0,
   		"default_cluster:db1": 381
   	},
   	"count": 0
   }

2. View the FE election group situation

   GET /api/show_meta_info?action=show_ha
   
   Response:
   {
   	"msg": "success",
   	"code": 0,
   	"data": {
   		"can_read": "true",
   		"role": "MASTER",
   		"is_ready": "true",
   		"last_checkpoint_version": "1492",
   		"last_checkpoint_time": "1596465109000",
   		"current_journal_id": "1595",
   		"electable_nodes": "",
   		"observer_nodes": "",
   		"master": "10.81.85.89"
   	},
   	"count": 0
   }