MySQL 5.5 主从配置
MySQL的主从复制至少是需要两个Mysql的服务,当然MySQL的服务是可以分布在不同的服务器上,也可以在一台服务器上启动多个服务。
MySQL的主从复制至少是需要两个Mysql的服务,当然MySQL的服务是可以分布在不同的服务器上,也可以在一台服务器上启动多个服务。
(1)首先确保主从服务器上的MySQL版本相同
(2)在主服务器上,设置一个从数据库的账户,使用REPLICATION SLAVE赋予权限,如:
mysql> GRANT REPLICATION SLAVE ON *.* TO 'slave001'@'172.16.10.143' IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.13 sec)
(3)修改主数据库的配置文件my.cnf,开启BINLOG,并设置server-id的值,,修改之后必须重启Mysql服务
(4)之后可以得到主服务器当前二进[mysqld]
log-bin = /home/mysql/log/mysql-bin.log
server-id=1
制日志名和偏移量,这个操作的目的是为了在从数据库启动后,从这个点开始进行数据的恢复
mysql> 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)
(5)好了,现在可以停止主数据的的更新操作,并生成主数据库的备份,我们可以通过mysqldump到处数据到从数据库,当然了,你也可以直接用cp命令将数据文件复制到从数据库去
注意在导出数据之前先对主数据库进行READ LOCK,以保证数据的一致性
mysql> flush tables with read lock;
Query OK, 0 rows affected (0.19 sec)
之后是mysqldump
mysqldump -h127.0.0.1 -p3306 -uroot -p test > /home/chenyz/test.sql
最好在主数据库备份完毕,恢复写操作
mysql> unlock tables;
Query OK, 0 rows affected (0.28 sec)
(6)将刚才主数据备份的test.sql复制到从数据库,进行导入
(7)接着修改从数据库的my.cnf,增加server-id参数,指定复制使用的用户,主数据库服务器的ip,端口以及开始执行复制日志的文件和位置
server-id = 2
log-bin=mysql-bin
replicate-do-db=test
replicate-do-db=bbs
mysql>stop slave;
mysql>researt slave;
mysql>change master to master_host = 'VMS00782'
,master_user = 'replication',
master_password = 'ReplPass@123456',
master_port = 3306,
master_log_file = 'VMS00782-bin.000001',
master_log_pos = 120;
mysql>start slave;
mysql>show slave status;
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