mysql5.5主从复制总结
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