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> setglobal 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>
