MySQL 8.0 Reference Manual Including MySQL NDB Cluster 8.0

13.7.7.33 SHOW REPLICAS | SHOW SLAVE HOSTS Statement

{SHOW REPLICAS | SHOW SLAVE HOSTS}

Displays a list of replicas currently registered with the source. From MySQL 8.0.22, use SHOW REPLICAS in place of SHOW SLAVE HOSTS, which is deprecated from that release. In releases before MySQL 8.0.22, use SHOW SLAVE HOSTS. SHOW REPLICAS | SHOW SLAVE HOSTS requires the REPLICATION SLAVE privilege.

SHOW REPLICAS | SHOW SLAVE HOSTS should be executed on a server that acts as a replication source. The statement displays information about servers that are or have been connected as replicas, with each row of the result corresponding to one replica server, as shown here:

mysql> SHOW REPLICAS;
+------------+-----------+------+-----------+--------------------------------------+
| Server_id  | Host      | Port | Source_id | Replica_UUID                         |
+------------+-----------+------+-----------+--------------------------------------+
|         10 | iconnect2 | 3306 |         3 | 14cb6624-7f93-11e0-b2c0-c80aa9429562 |
|         21 | athena    | 3306 |         3 | 07af4990-f41f-11df-a566-7ac56fdaf645 |
+------------+-----------+------+-----------+--------------------------------------+