1. 関連するプラグインをインストールします
show plugins; 查看模块 help --uninstall; 查看卸载模块
master: mysql> install plugin rpl_semi_sync_master soname 'semisync_master.so'; --安装 semisync_master.so插件 Query OK, 0 rows affected (0.03 sec) slave: root@localhost [zw3306]>install plugin rpl_semi_sync_slave soname 'semisync_slave.so'; --安装 semisync_slave.so插件 Query OK, 0 rows affected (0.00 sec) root@localhost [zw3306]>install plugin rpl_semi_sync_master soname 'semisync_master.so'; Query OK, 0 rows affected (0.00 sec)
2. 変更されたパラメータ:
set global rpl_semi_sync_master_enabled=1; set global rpl_semi_sync_master_timeout=1000; set global rpl_semi_sync_slave_enabled=1;
設定ファイル [mysqld] に直接書き込むこともできます。 変更されたパラメータ再起動が必要です:
変更されたパラメータを表示します
master:
[mysqld]
rpl_semi_sync_master_enabled = 1
rpl_semi_sync_master_timeout = 1000 # 1 second
slave:
[mysqld]
rpl_semi_sync_slave_enabled = 1
master:
mysql> show global variables like '%rpl_semi%';
+-------------------------------------------+------------+
| Variable_name | Value |
+-------------------------------------------+------------+
| rpl_semi_sync_master_enabled | ON |
| rpl_semi_sync_master_timeout | 1000 |
| rpl_semi_sync_master_trace_level | 32 |
| rpl_semi_sync_master_wait_for_slave_count | 1 |
| rpl_semi_sync_master_wait_no_slave | ON |
| rpl_semi_sync_master_wait_point | AFTER_SYNC |
+-------------------------------------------+------------+
6 rows in set (0.00 sec)
slave:
root@localhost [(none)]>show global variables like '%rpl_semi%';
5. スレーブにデータがあるかどうかを確認します+-------------------------------------------+------------+
| Variable_name | Value |
+-------------------------------------------+------------+
| rpl_semi_sync_master_enabled | ON |
| rpl_semi_sync_master_timeout | 1000 |
| rpl_semi_sync_master_trace_level | 32 |
| rpl_semi_sync_master_wait_for_slave_count | 1 |
| rpl_semi_sync_master_wait_no_slave | ON |
| rpl_semi_sync_master_wait_point | AFTER_SYNC |
| rpl_semi_sync_slave_enabled | ON |
| rpl_semi_sync_slave_trace_level | 32 |
+-------------------------------------------+------------+
8 rows in set (0.00 sec)
stop slave io_thread;
start slave io_thread;
れぇぇぇぇぇぇ
change master to master_host='192.168.26.233', master_port=3306, master_user='repl',master_password='repl', master_auto_position=1;
root@localhost [(none)]>start slave;
Query OK, 0 rows affected (0.01 sec)
root@localhost [(none)]>show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.26.233
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000002
Read_Master_Log_Pos: 194
Relay_Log_File: relay-bin.000004
Relay_Log_Pos: 407
Relay_Master_Log_File: mysql-bin.000002
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 194
Relay_Log_Space: 861
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 3306100
Master_UUID: 7e354a2c-6f5f-11e6-997d-005056a36f08
Master_Info_File: mysql.slave_master_info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set: 7e354a2c-6f5f-11e6-997d-005056a36f08:1-9
Executed_Gtid_Set: 7e354a2c-6f5f-11e6-997d-005056a36f08:1-9,
ba0d5587-74d6-11e6-ab5c-005056a3f46e:1-2
Auto_Position: 1
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)
ERROR:
No query specified
rreerreeee
root@localhost [zw3306]>show tables;
+------------------+
| Tables_in_zw3306 |
+------------------+
| t1 |
+------------------+
1 row in set (0.00 sec)
Rpl_semi_sync_master_no_tx
この値が大きい場合、問題が発生しますAl他にも理由があります。準同期スレーブとは何ですか?
以上がmysql 5.7 で半同期レプリケーションを有効にする方法の詳細内容です。詳細については、PHP 中国語 Web サイトの他の関連記事を参照してください。