MySQL是开源的关系型数据库系统。主从同步复制(Replication)是从一台MySQL数据库服务器(主服务器master)复制数据到另一个服务器
MySQL数据库的同步。
MySQL是开源的关系型数据库系统。主从同步复制(Replication)是从一台MySQL数据库服务器(主服务器master)复制数据到另一个服务器(从服务器slave)的一个进程。
配置主服务器(master)
1、编辑数据库配置文件my.cnf 或 my.ini (windows),一般在/etc/目录下。
#vi /etc/my.cnf
在[mysqld]的下面加入下面代码:
log-bin=mysql-bin
server-id=1
innodb_flush_log_at_trx_commit=1
sync_binlog=1
binlog-do-db=wordpress
binlog_ignore_db=mysql
server-id=1中的1可以任定义,只要是唯一的就行。
binlog-do-db=wordpress是表示只备份wordpress。
binlog_ignore_db=mysql表示忽略备份mysql。
不加binlog-do-db和binlog_ignore_db,那就表示备份全部数据库。
2、然后重启MySQL:
#service mysqld restart
3、登录MySQL服务器。
#mysql -uroot -p
在主服务器新建一个用户赋予“REPLICATION SLAVE”的权限。你不需要再赋予其它的权限。在下面的命令,把X.X.X.X替换为从服务器的IP。
mysql>CREATE USER 'user'@ 'X.X.X.X' IDENTIFIED BY 'password';
mysql>GRANT REPLICATION SLAVE ON *.* TO 'user'@'X.X.X.X' IDENTIFIED BY 'password';
4、执行以下命令锁定数据库以防止写入数据。
mysql>FLUSH TABLES WITH READ LOCK;
5、退出mysql命令行,,导出数据库
#mysqldump -u root -p123456 --all-databases > /root/all.sql
6、使用scp命令传输数据库文件all.sql到从服务器。
#scp /root/all.sql root@:/root
7、再次连接数据库进入mysql命令行查看master状态。
mysql>SHOW MASTER STATUS;
请记下显示的信息,配置从服务器会用到。
+——————+———-+————–+——————+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+——————+———-+————–+——————+
| mysql-bin.000001| 253| dbispconfig | mysql |
+——————+———-+————–+——————+
1 row in set (0.00 sec)
8、解锁数据表。
mysql>UNLOCK TABLES;

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