mysql互为主从复制详解----mysql-mm(8)

mysql> change master to
    -> master_host='211.100.97.250'
    -> master_user='repl2',
    -> master_password='123456',
    -> master_log_file='mysql-bin.000002',
    -> master_log_pos=106;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'master_user='repl2',
master_password='123456',
master_log_file='mysql-bin.000002' at line 3

4）
在没有停止slave进程的情况下change master
mysql> change master to master_host='211.100.97.246', master_user='repl1', master_password='123456', master_log_file='mysql-bin.000001',master_log_pos=106;
ERROR 1198 (HY000): This operation cannot be performed with a running slave; run STOP SLAVE first

5）
A B的server-id相同：
Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server ids;
these ids must be different for replication to work (or the --replicate-same-server-id option must be used on
slave but this does not always make sense; please check the manual before using it).
查看server-id
mysql> show variables like 'server_id';
手动修改server-id
mysql> set global server_id=2; #此处的数值和my.cnf里设置的一样就行
mysql> slave start;

6）change master之后，查看slave的状态，发现slave_IO_running 为NO
需要注意的是，做完上述操作之后最后重启mysql进程
---------------------------------------
同步数据情况
A：在A上插入数据
mysql> create table aniya (id int not null auto_increment primary key, str varchar(255) not null);
mysql> insert into aniya(str) values
    -> ('This is a master to master test table');
 
mysql> select * from aniya;
+----+---------------------------------------+
| id | str                                   |
+----+---------------------------------------+
|  1 | This is a master to master test table |
+----+---------------------------------------+
1 row in set (0.00 sec)

查看B的日志：
[root@XKWB5705 var]# ls -lrth XKWB5705-relay-bin.000003
-rw-rw---- 1 mysql mysql 576 Sep 26 12:29 XKWB5705-relay-bin.000003
[root@XKWB5705 var]# more XKWB5705-relay-bin.000003
.in.N


(id int not null auto_increment primary key,
str varchar(255) not null)3
('This is a master to master test table')

-----
 B A主从同步测试

在B上创建表lian，并插入数据
mysql> create table lian (a int,b char(10));