0.安装配置replication（略）

1.On Master:mysql> INSTALL PLUGIN rpl_semi_sync_master SONAME 'semisync_master.so';

2. On Slave:mysql> INSTALL PLUGIN rpl_semi_sync_slave SONAME 'semisync_slave.so';

3.master:　mysql> SET GLOBAL rpl_semi_sync_master_enabled = 1;

slave:　SET GLOBAL rpl_semi_sync_slave_enabled = 1;`

mysql> stop slave io_thread;

mysql> start slave io_thread;

４. 几个监控命令：

mysql> SHOW STATUS LIKE 'Rpl_semi_sync%';

mysql> SHOW variables LIKE '%sync%';

mysql> show plugins;