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HomeDatabaseMysql TutorialCentOS Linux更改MySQL数据库目录位置具体操作_MySQL

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bitsCN.com 引言
由于MySQL的数据库太大,默认安装的/var盘已经再也无法容纳新增加的数据,没有办法,只能想办法转移数据的目录。

下面我整理一下把MySQL从/var/lib/mysql目录下面转移到/home/mysql_data/mysql目录的具体操作: 

1、首先我们需要关闭MySQL,命令如下
service mysqld stop
2、然后是转移数据,为了安全期间,我们采用复制命令cp,先找到mysql的原目录
cd /var/lib
ls
运行这个命令之后就会看到mysql的目录了,然后执行cp命令
cp -a mysql /home/mysql_data/ #这样就把数据库复制到/home/mysql_data下面去了

注意:(-a这个参数一定要带着,否则复制过去的权限就不对了。)

如果数据库比较大的话,时间会比较长,可能会超时,具体怎么设置ssh不超时的办法,请大家自己找相关资料。
3、然后我们修改配置文件,一共有三个,下面我一一说明
修改第一个文件:修改之前先备份cp /etc/my.cnf /etc/my.cnfbak
vi /etc/my.cnf
打开之后修改datadir的目录为/home/mysql_data/mysql
把socket改成/home/mysql_data/mysql/mysql.sock #为了安全起见,你可以把原来的注释掉,然后重新加入一行,改成现在的目录。
==================================================================================
修改第二个文件:修改之前先备份 cp /etc/init.d/mysqld /etc/init.d/mysqldbak
vi /etc/init.d/mysqld
注意:准确的位置是/etc/rc.d/init.d/mysqld,由于这里这里有一个/etc/init.d到/etc/rc.d/init.d的映射,
所以用上面的命令即可,也简单。
把其中datadir=/var/lib/mysql一行中,等号右边的路径改成你现在的实际存放路径:/home/mysql_data/mysql
=================================================================================
修改第三个文件:修改之前先备份 cp /usr/bin/mysqld_safe /usr/bin/mysqld_safebak
vi /usr/bin/mysqld_safe
这里也是修改datadir的目录为/home/mysql_data/mysql
==================================================================================
4、下面需要建立一个mysql.sock的链接
ln -s /home/mysql_data/mysql/mysql.sock /var/lib/mysql/mysql.sock
系统运维 温馨提醒:qihang01原创内容版权所有,转载请注明出处及原文链接

至此所有的修改都完成了,下面启动mysql
service mysqld start
或者重启linux
reboot
如果能正常启动,说明修改成功。bitsCN.com
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