Table of Contents
1,mysql的配置
2,场景描述
6,测试是否同步
Home Database Mysql Tutorial MySQL主从复制(Master-Slave)与读写分离(MySQL-Proxy)实践

MySQL主从复制(Master-Slave)与读写分离(MySQL-Proxy)实践

Jun 07, 2016 pm 04:38 PM
mysql separation copy Read and write

接触php已快有3年了,一直想有所突破,最近看了下分布和数据库读写分离。总算也小有成果.....前段时间发布了,用ngix实现分流 nginx 配置轮询分流-实现负载均衡【测试通过】 今天就来分享一下,数据库读写分离并且同步。我目前,介绍的是1台写入服务器,n台

接触php已快有3年了,一直想有所突破,最近看了下分布和数据库读写分离。总算也小有成果.....前段时间发布了,用ngix实现分流

nginx 配置轮询分流-实现负载均衡【测试通过】

今天就来分享一下,数据库读写分离并且同步。我目前,介绍的是1台写入服务器,n台读取服务器....

写这个的同时,我在思考一个问题,如果写入压力过大的时候,1台服务器写入不够用,那么写入该怎么办!利用队列,缓存!一台服务器慢慢写?还求大神给解释,求带!


1,mysql的配置

mysql的配置我就不多说了,看我 另一篇文章

CentOS 5.x,6.0编译安装Nginx1.2.3+MySQL5.5.15+PHP5.3.6

我是再这个环境下做测试的,我是配置了1台。利用VMware Workstation拷贝出来多台服务器的,所以环境绝对一样。


2,场景描述

主数据库服务器:192.168.10.130
从数据库服务器:192.168.10.131


3 ,配置主服务器

修改从服务器的配置文件,my.cnf 不一定路径和我一样哦,注意修改

vi etc/my.cnf
Copy after login
Copy after login
确定 server-id = 1,并确保这个ID没有被别的MySQL服务所使用。

启动mysql服务(192.168.10.130)

/etc/init.d/mysqld  start
Copy after login

通过命令行登录管理MySQL服务器
mysql -uroot -p
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Copy after login

授权给从数据库服务器192.168.10.131
mysql> GRANT REPLICATION SLAVE ON *.* to 'rep1'@'192.168.10.131' identified by '123';
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查询主数据库状态
Mysql> show master status;
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+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000005 | 261 | | |
+------------------+----------+--------------+------------------+

记录下 FILE (mysql-bin.000005) 及 Position(261) 的值,在后面进行从服务器操作的时候需要用到。

4,配置从服务器


修改从服务器的配置文件,my.cnf 不一定路径和我一样哦,注意修改

vi etc/my.cnf
Copy after login
Copy after login
将 server-id = 1修改为 server-id = 2,并确保这个ID没有被别的MySQL服务所使用。

启动mysql服务
/opt/mysql/init.d/mysql start
Copy after login

通过命令行登录管理MySQL服务器
mysql -uroot -p
Copy after login
Copy after login

执行同步SQL语句

mysql> change master to
master_host=’192.168.10.130’,
master_user=’rep1’,
master_password=’123’,
master_log_file=’mysql-bin.000005’,
master_log_pos=261;

注意上面的数据要和主服务器一样,否则同步会失败!
?

正确执行后启动Slave同步进程

mysql> start slave;
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主从同步检查

mysql> show slave status\G
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其中Slave_IO_Running 与 Slave_SQL_Running 的值都必须为YES,才表明状态正常。

如果不是,请检查上面是否那一步骤有问题!可以留言给我。。。如果都YES 可以进入下一步操作


5,第一次同步主从服务器数据

锁定主服务器mysql:

mysql> FLUSH TABLES WITH READ LOCK;
Copy after login
Copy after login

锁定从服务器mysql:

mysql> FLUSH TABLES WITH READ LOCK;
Copy after login
Copy after login

将主服务器的数据文件(整个/opt/mysql/data目录)复制到从服务器,建议通过tar归档压缩后再传到从服务器解压覆盖。

开启主服务器mysql:

mysql> UNLOCK TABLES;
Copy after login
Copy after login

开启从服务器mysql:

mysql> UNLOCK TABLES;
Copy after login
Copy after login

6,测试是否同步

在主服务器上操作:

 mysql> create database first_db;
 mysql> use first_db;
 mysql> create table first_tb(id int(3),name char(10));
 mysql> INSERT INTO `first_tb` VALUES ('1', '1');
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在从服务器上查看....

mysql> show databases;
Copy after login
=============================
+--------------------+
| Database |
+--------------------+
| information_schema |
| first_db |
| mysql |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.01 sec)
=============================


数据已经同步过来了。现在只要在主服务器上有任何操作,都会自动同步到从服务器来。





作者:open520yin 发表于2013-8-8 16:44:01 原文链接

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MySQL主从复制(Master-Slave)与读写分离(MySQL-Proxy)实践

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