修改mysql数据存储的地址

修改mysql数据存储的地址
修改步骤如下
1,修改前为默认路径/var/lib/mysql/，计划修改为/data/mysql/data
mysql> show variables like '%dir%';
+-----------------------------------------+----------------------------+
| Variable_name                           | Value                      |
+-----------------------------------------+----------------------------+
| basedir                                 | /usr                       |
| binlog_direct_non_transactional_updates | OFF                        |
| character_sets_dir                      | /usr/share/mysql/charsets/ |
| datadir                                 | /var/lib/mysql/            |
| innodb_data_home_dir                    |                            |
| innodb_log_group_home_dir               | ./                         |
| innodb_max_dirty_pages_pct              | 75                         |
| lc_messages_dir                         | /usr/share/mysql/          |
| plugin_dir                              | /usr/lib64/mysql/plugin/   |
| slave_load_tmpdir                       | /tmp                       |
| tmpdir                                  | /tmp                       |
+-----------------------------------------+----------------------------+
11 rows in set (0.00 sec)

2，关闭mysql服务
service mysql stop


3，新建目录，修改权限并cp相关文件到目标目录
新的数据存储路径为/data/mysql/data
mkdir -p /data/mysql/data
更改新路径权限宿主
chown  mysql:mysql /data/mysql/data
将原数据全部拷贝到新路径
cp  -a /var/lib/mysql/*  /data/mysql/data/


4,修改配置文件
[root@stmysql1 lib]# vi /etc/rc.d/init.d/mysql

basedir=
datadir=/data/mysql/data

5，启动mysql
service mysql start

6，修改后的地址如下，已修改成功

-bash-3.2$ mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.5.33 MySQL Community Server (GPL)

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show variables like '%dir%';
+-----------------------------------------+----------------------------+
| Variable_name                           | Value                      |
+-----------------------------------------+----------------------------+
| basedir                                 | /usr                       |
| binlog_direct_non_transactional_updates | OFF                        |
| character_sets_dir                      | /usr/share/mysql/charsets/ |
| datadir                                 | /data/mysql/data/          |
| innodb_data_home_dir                    |                            |
| innodb_log_group_home_dir               | ./                         |
| innodb_max_dirty_pages_pct              | 75                         |
| lc_messages_dir                         | /usr/share/mysql/          |
| plugin_dir                              | /usr/lib64/mysql/plugin/   |
| slave_load_tmpdir                       | /tmp                       |
| tmpdir                                  | /tmp                       |
+-----------------------------------------+----------------------------+
11 rows in set (0.00 sec)