CentOSでMySQL5.5いれて準同期レプリケーション組むまで ref: http://qiita.com/srockstyle/items/aa6220a58ba9d8318155

file1.txt

GRANT REPLICATION SLAVE ON *.* TO 'slave-user'@'%' IDENTIFIED BY 'slave-password';

file2.txt

show master status;

file4.txt

CHANGE MASTER TO MASTER_HOST = '[IPADDRESS]', MASTER_USER = '[USER]', MASTER_PASSWORD = '[PASSWORD]',MASTER_PORT=3306;

start slave;

file5.txt

mysql> SHOW GLOBAL VARIABLES LIKE "rpl%";
+------------------------------------+-------+
| Variable_name                      | Value |
+------------------------------------+-------+
| rpl_recovery_rank                  | 0     |
| rpl_semi_sync_master_enabled       | ON    |
| rpl_semi_sync_master_timeout       | 10    |
| rpl_semi_sync_master_trace_level   | 32    |
| rpl_semi_sync_master_wait_no_slave | ON    |
+------------------------------------+-------+
5 rows in set (0.01 sec)

file6.txt

mysql> SHOW GLOBAL VARIABLES LIKE "rpl%";
+---------------------------------+-------+
| Variable_name                   | Value |
+---------------------------------+-------+
| rpl_recovery_rank               | 0     |
| rpl_semi_sync_slave_enabled     | ON    |
| rpl_semi_sync_slave_trace_level | 32    |
+---------------------------------+-------+
3 rows in set (0.00 sec)

mysql> SHOW STATUS LIKE 'Rpl_semi_sync%';
+----------------------------+-------+
| Variable_name              | Value |
+----------------------------+-------+
| Rpl_semi_sync_slave_status | ON    |
+----------------------------+-------+
1 row in set (0.00 sec)

my.cnf

server-id=2
sync_binlog=1
log-bin=mysql-bin
plugin-load=rpl_semi_sync_slave=semisync_slave.so
rpl_semi_sync_slave_enabled=1
read_only