MariaDB 10.0のMulti-source replicationを試す

MariaDB 10.0.2でインプリメントされたMulti-source replication(1スレーブに複数マスター構成)、MySQL 5.6に紛れて試していなかったんだけれど時間があったのでちょっとだけ試してみた。

リファレンス　⇒　https://mariadb.com/kb/en/multi-source-replication/

MariaDB KnowledgebaseはWEB遅い、マニュアル見づらい感。。

mariadb> SHOW ALL SLAVES STATUS\G
Empty set (0.00 sec)

mariadb> CHANGE MASTER 'mysql56' TO master_host= 'localhost', master_port= 64056, master_user= 'replicator', master_log_file= 'bin.000001', master_log_pos= 1;
Query OK, 0 rows affected (0.03 sec)

mariadb> SHOW SLAVE 'mysql56' STATUS\G
*************************** 1. row ***************************
               Slave_IO_State:
                  Master_Host: localhost
                  Master_User: replicator
                  Master_Port: 64056
                Connect_Retry: 60
              Master_Log_File: bin.000001
          Read_Master_Log_Pos: 4
               Relay_Log_File: relay-mysql56.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: bin.000001
             Slave_IO_Running: No
            Slave_SQL_Running: No
..
1 row in set (0.00 sec)

mariadb> CHANGE MASTER 'mysql55' TO master_host= 'localhost', master_port= 64055, master_user= 'replicator', master_log_file= 'bin.000001', master_log_pos= 1;
Query OK, 0 rows affected (0.02 sec)

mariadb> SHOW ALL SLAVES STATUS\G
*************************** 1. row ***************************
              Connection_name: mysql55
              Slave_SQL_State:
               Slave_IO_State:
                  Master_Host: localhost
                  Master_User: replicator
                  Master_Port: 64055
                Connect_Retry: 60
              Master_Log_File: bin.000001
          Read_Master_Log_Pos: 4
               Relay_Log_File: relay-mysql55.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: bin.000001
             Slave_IO_Running: No
            Slave_SQL_Running: No
..
*************************** 2. row ***************************
              Connection_name: mysql56
              Slave_SQL_State:
               Slave_IO_State:
                  Master_Host: localhost
                  Master_User: replicator
                  Master_Port: 64056
                Connect_Retry: 60
              Master_Log_File: bin.000001
          Read_Master_Log_Pos: 4
               Relay_Log_File: relay-mysql56.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: bin.000001
             Slave_IO_Running: No
            Slave_SQL_Running: No
..
2 rows in set (0.00 sec)

mariadb> SHOW SLAVE STATUS\G
Empty set (0.00 sec)

mariadb> SET SESSION default_master_connection= 'mysql55';
Query OK, 0 rows affected (0.01 sec)

mariadb> SHOW SLAVE STATUS\G
*************************** 1. row ***************************
               Slave_IO_State:
                  Master_Host: localhost
                  Master_User: replicator
                  Master_Port: 64055
                Connect_Retry: 60
              Master_Log_File: bin.000001
          Read_Master_Log_Pos: 107
               Relay_Log_File: relay-mysql55.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: bin.000001
             Slave_IO_Running: No
            Slave_SQL_Running: No
..

mariadb> START SLAVE;
ERROR 1200 (HY000): The server is not configured as slave; fix in config file or with CHANGE MASTER TO

こんな感じで設定。
取り敢えずハマったのは、

• SHOW ALL SLAVESとか。
• SET SESSION default_master_connectionしておくと、コネクション名を指定しないSTART SLAVEとかはそのコネクションあてになる。
• connection name(mysql55とかmysql56とかしてるやつ)はクォートしないといけない。
• START SLAVE 'mysql55'; もSTART ALL SLAVES; も何故か通らない（何が足りないのか調べてない。。）