mysql主主配置和主从配置的不同点在于主从的master不监控slavebin-log的变化，导致slave有新数据不能更新到master
主主配置的关键参数：log-slave-updates,两台mysql都需添加
测试环境：
centos 6.5 x64
主1ip:192.168.0.1
主2ip:192.168.0.2
主主配置
主1
vim /etc/my.cnf
server-id=1
bin-log=mysql-bin
binlog-format=mixed
log-slave-updates
relay-log=mysql-relay
主2
server-id=2
bin-log=mysql-bin
binlog-format=mixed
log-slave-updates
relay-log=mysql-relay
修改配置后均重启mysql使配置生效
分别在主1和主2上做主从
一、给主1配置从
在主1上
1.授权登陆账号(两边要建立可复制的账号)
grant replication client,replication slave on *.* to ‘salve‘@‘192.168.0.*‘ identified by ‘test123‘;
2.show master status;
mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000002 | 653 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
在主2上
stop slave;
reset slave;
change master to master_host=‘192.168.0.1‘,master_user=‘slave‘,master_password=‘test123‘,master_log_file=‘mysql-bin.000002‘,master_log_pos=653;
start slave;
show salve status\G;
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
即成功
一、给主2配置从
步骤通给主1配置从
测试：
分别在主1和主2添加数据，看在另一台是否能查询
在主1上
mysql> select * from t;
+---+
| s |
+---+
| 2 |
+---+
1 row in set (0.00 sec)
mysql> insert into t values (3);
Query OK, 1 row affected (0.01 sec)
mysql> select * from t;
+---+
| s |
+---+
| 2 |
| 3 |
+---+
2 rows in set (0.00 sec)
mysql> select * from t;
+---+
| s |
+---+
| 2 |
| 3 |
| 4 |
+---+
3 rows in set (0.00 sec)
在主2上
mysql> use proxy_test;
Database changed
mysql> select * from t;
+---+
| s |
+---+
| 2 |
+---+
1 row in set (0.00 sec)
mysql> select * from t;
+---+
| s |
+---+
| 2 |
| 3 |
+---+
2 rows in set (0.00 sec)
mysql> insert into t values (4);
Query OK, 1 row affected (0.00 sec)
mysql> select * from t;
+---+
| s |
+---+
| 2 |
| 3 |
| 4 |
+---+
3 rows in set (0.00 sec)
主主配置到此测试成功