修改Mariadb数据库文件存储路径

mysql也是类似的配置。
MariaDB默认的数据的存储目录为/var/lib/mysql，准备改为/data/mysql。

停止服务

systemctl stop mariadb

数据迁移

mv /var/lib/mysql /data/mysql

修改配置

vim /etc/my.cnf

# 在[client-server]中添加
socket=/data/mysql/mysql.sock

# 在[mysqld]中添加，末尾必须是/
datadir=/data/mysql/

完整配置

#
# This group is read both both by the client and the server
# use it for options that affect everything
#
[client-server]
socket=/data/mysql/mysql.sock

#
# include all files from the config directory
#
!includedir /etc/my.cnf.d

[mysqld]
init_connect='SET collation_connection = utf8mb4_unicode_ci'
init_connect='SET NAMES utf8mb4'
character_set_server=utf8mb4
collation-server=utf8mb4_unicode_ci
skip-character-set-client-handshake=true
datadir=/data/mysql/

注：datadir上面的五行是设置默认字符集为utf8mb4，否则emoji表情是无法正确存储的。

验证

# 登录
mysql -uroot -p

# 查询
show global variables like "%datadir%";

# 结果
MariaDB [(none)]> show global variables like "%datadir%";
+---------------+--------------+
| Variable_name | Value        |
+---------------+--------------+
| datadir       | /data/mysql/ |
+---------------+--------------+
1 row in set (0.00 sec)