環境
角色
IP
port
master
192.168.80.136
3310
slave
192.168.80.137
3310

master

[mysqld]
rpl_semi_sync_master_enabled=1
rpl_semi_sync_master_timeout=1000 #1 second

slave

[mysqld]
rpl_semi_sync_slave_enabled=1

先安裝外掛在修改引數

on the master

install plugin rpl_semi_sync_master soname ‘semisync_master.so’;

on each slave

install plugin rpl_semi_sync_slave soname ‘semisync_slace.so’;

set global rpl_semi_sync_master_enable=1;
set global rpl_semi_sync_master_timeout=1000; #1 second
set global rpl_semi_sync_slave_enabled=1;

利用show plugins;確認模組是否載入進來 並將配置同步到my.cnf中
show plugins;
help uninstall
uninstall plugin rpl_semi_sync_slave;

[mysqld]
rpl_semi_sync_master_enable=1;
rpl_semi_sync_master_timeout=1000; #1 second
rpl_semi_sync_slave_enabled=1;

原來已經是建好的複製結構
stop slave io_thread;
start slave io_thread;

master

grant replication slave on . to ‘repl’@’192.168.90.%’ identified by ‘repl4slave’;
select user,host from mysql.user;

slave

change master to master_host=’192.168.80.136’,master_user=’repl’,master_password=’repl4slave’,master_port=3310,master_log_file=’mysql-bin.000001’,master_log_pos=154;
start slave;
show slave status\G

驗證是否同步

監控
show global status like ‘%semi%’;

show global variables lile ‘%semi%’;

是否處在半同步複製
rpl_semi_sync_master_enabled=on
rpl_semi_sync_slave_enabled=on

set global rpl_semi_sync_master_wait_for_slave_count=2; –預設為1 主庫收到幾個從庫的應答

show global status like ‘%semi%’;
rpl_semi_sync_master_no_tx
rpl_semi_sync_master_yew_tx