总结下mysql主从复制大致的思路，当然要想做的完美的话，需要注意很多细节。

1 主库，建立从库连接的帐号

GRANT REPLICATION SLAVE ON *.* TO 'slave'@'192.168.100.70' IDENTIFIED BY

'123456';

flush privileges;

//从数据库可以测试此账户是否可正常使用mysql -h ip -u repl -P端口 -p

2 修改主库的配置文件,开启binlog

log-bin = mysql-bin

server-id = 1

3 重启mysql（非必须，待验证）,

show master status\G

*************************** 1. row ***************************

File: mysql-bin.000003

Position: 243

Binlog_Do_DB:

Binlog_Ignore_DB:

1 row in set (0.00 sec)

3 停止主库的更新操作，并生成主库的备份

导出前，readlock

flush tables with read lock;

mysqldump cswei > /data/cswei.sql

备份完毕，恢复写操作

unlock tables;

4 将备份的数据导入从库

create database cswei;//没有，建立库

source /data/cswei.sql

5 修改从库配置文件

据网上消息介绍，Mysql版本从5.1.7以后开始就不支持“master-host” 类似的参数

在配置文件增加2项，即可

server-id = 2

replicate-do-db = mydatabase

6 从库,赋予从库复制功能

mysql>change master to master_host='192.168.100.70′,master_user='slave',

master_password='123456‘,master_log_file='mysql-bin.000001′,master_log_pos=106;

其中master_log_file和master_log_pos通过在主数据库show master status;得到。

端口不是默认端口的话，如master_port=3307，不要加引号。

7 从库 开启复制

mysql> slave start;

mysql> show slave status\G

*************************** 1. row ***************************

Slave_IO_State: Waiting for master to send event

Master_Host: 192.168.100.70 Master_User: slave

Master_Port: 3306 Connect_Retry: 60

Master_Log_File: mysql-bin.000011

Read_Master_Log_Pos: 399

Relay_Log_File: mysql-relay-bin.000002

Relay_Log_Pos: 545 Relay_Master_Log_File: mysql-bin.000011

Slave_IO_Running: Yes Slave_SQL_Running: Yes

Replicate_Do_DB: cswei

Replicate_Ignore_DB:

Replicate_Do_Table:

Replicate_Ignore_Table:

Replicate_Wild_Do_Table:

Replicate_Wild_Ignore_Table:

Last_Errno: 0

Last_Error:

Skip_Counter: 0

Exec_Master_Log_Pos: 399

Relay_Log_Space: 701

Until_Condition: None

Until_Log_File:

Until_Log_Pos: 0

Master_SSL_Allowed: No

Master_SSL_CA_File:

Master_SSL_CA_Path:

Master_SSL_Cert:

Master_SSL_Cipher:

Master_SSL_Key:

Seconds_Behind_Master: 0

Master_SSL_Verify_Server_Cert: No

Last_IO_Errno: 0

Last_IO_Error:

Last_SQL_Errno: 0

Last_SQL_Error:

Replicate_Ignore_Server_Ids:

Master_Server_Id: 1