MySQL主从复制异步半同步实例

建立mysql的复制

node1:

mysql> show master status;

+------------------+----------+--------------+------------------+-------------------+

| File            | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

+------------------+----------+--------------+------------------+-------------------+

| mysql-bin.000003 |      120 |              |                  |                  |

+------------------+----------+--------------+------------------+-------------------+

1 row in set (0.00 sec)

mysql>

node2:

mysql> change master to master_host='192.168.56.102',master_user='qwer',master_password='system',master_log_file='mysql-bin.000003',master_log_pos=120,master_port=3306;

Query OK, 0 rows affected, 2 warnings (0.04 sec)

mysql> start slave;

Query OK, 0 rows affected (0.03 sec)

mysql> show slave status\G

*************************** 1. row ***************************

Slave_IO_State: Waiting for master to send event

Master_Host: 192.168.56.102

Master_User: qwer

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000003

Read_Master_Log_Pos: 120

Relay_Log_File: node2-relay-bin.000002

Relay_Log_Pos: 283

Relay_Master_Log_File: mysql-bin.000003

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

Replicate_Do_DB: tongs

2.加载插件

node1:

mysql> install plugin rpl_semi_sync_master soname 'semisync_master.so';

mysql> set global rpl_semi_sync_master_enabled=1;        --开启半同步

mysql> set global rpl_semi_sync_master_timeout=1000;      --半同步1000毫秒

node2:

mysql> install plugin rpl_semi_sync_slave soname 'semisync_slave.so';

mysql> set  global rpl_semi_sync_slave_enabled=1;

3.查看状态

node1:

mysql> show variables like '%rpl_%';

+-------------------------------------------+------------+

| 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_stop_slave_timeout                    | 31536000  |

+-------------------------------------------+------------+

7 rows in set (0.00 sec)

mysql>

node2:

mysql> show variables like '%rpl_%';

+---------------------------------+----------+

| Variable_name                  | Value    |

+---------------------------------+----------+

| rpl_semi_sync_slave_enabled    | ON      |

| rpl_semi_sync_slave_trace_level | 32      |

| rpl_stop_slave_timeout          | 31536000 |

+---------------------------------+----------+

3 rows in set (0.00 sec)

mysql>