需求：MySQL的原目錄沒空間了，需要在本機(jī)中遷移mysql目錄

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mkdir -p /home/mysql3306/data
mkdir -p /home/mysql3306/log
mkdir -p /home/mysql3306/run/mysqld

原目錄：/var/lib/mysql
遷移目標(biāo)目錄：/home/mysql3306/data
cp -r /var/lib/mysql/* /home/mysql3306/data/

chown -R mysql.mysql /home/mysql3306

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vim /etc/my.cnf
#join_buffer_size = 128M
#sort_buffer_size = 2M
#read_rnd_buffer_size = 2M
#datadir=/var/lib/mysql
datadir=/home/mysql3306/data
#socket=/var/lib/mysql/mysql.sock
socket=/home/mysql3306/data/mysql.sock
lower_case_table_names=1
#Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
max_connections=1000
max_connect_errors=300
#Recommended in standard MySQL setup
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[mysqld_safe]
#log-error=/var/log/mysqld.log
log-error=/home/mysql3306/log/mysqld.log
#pid-file=/var/run/mysqld/mysqld.pid
pid-file=/home/mysql3306/run/mysqld/mysqld.pid
[mysql] ## 這里加2行，避免mysql -uroot -p的時(shí)候報(bào)找不到sock文件
socket=/home/mysql3306/data/mysql.sock
wq： 這里保存
————————————————————————————————
vim /etc/init.d/mysqld ## 修改下面的變量
get_mysql_option mysqld datadir "/home/mysql3306/data"
#get_mysql_option mysqld datadir "/var/lib/mysql"
datadir="$result"
get_mysql_option mysqld socket "$datadir/mysql.sock"
socketfile="$result"
get_mysql_option mysqld_safe log-error "/home/mysql3306/log/mysqld.log"
#get_mysql_option mysqld_safe log-error "/var/log/mysqld.log"
errlogfile="$result"
get_mysql_option mysqld_safe pid-file "/home/mysql3306/run/mysqld/mysqld.pid"
#get_mysql_option mysqld_safe pid-file "/var/run/mysqld/mysqld.pid"
——————————————————————————————————

/etc/init.d/mysqld stop
/etc/init.d/mysqld start
mysql -uroot -p 驗(yàn)證下是否數(shù)據(jù)都在
desc 表名；
保錯(cuò) SQLSTATE[HY000]: General error: 1030 Got error 28 from storage engine
這是因?yàn)?tmp 目錄沒空間了，rm -rf /var/lib/mysql 釋放空間即可，刪除別的文件也行，只要能釋放些空間即可。

完成