Home Database Mysql Tutorial MySQL备份时排除指定数据库的方法_MySQL

MySQL备份时排除指定数据库的方法_MySQL

May 27, 2016 pm 01:44 PM
mysql backup exclude

使用mysqldump命令备份时候,--all-databases 可以备份所有的数据库。 使用ignore-table 还可以排除制定的表。但是,mysqldump没有参数可以排除数据库的。

要备份的数据库少的时候,可以通过mysqldump -uroot -p123456 --databases db1 db2 db3 > mysqldump.sql 这样来备份。

但是假如数据库有数十个的话,这样写起来很累人,也很low。解决办法还是有的,看下面:

【下面演示用的mysql用户名的root,密码123456】

mysql -uroot -p123456 -e 'show databases;'|grep -E -v "Database|information_schema|mysql|test" |xargs 
mysqldump -uroot -p123456 --databases > mysqldump1.sql
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但是很不幸的是,在mysql5.5上执行备份时报错了。

查了下资料,发现是由于5.5以后,mysql的performance_schema库导致的。那我们备份时跳过该库即可,下面2种方法任选:

1、mysql -uroot -p123456 -e 'show databases;'|grep -E -v "Database|information_schema|mysql|test"|xargs 
mysqldump -uroot -p123456 --skip-lock-tables performance_schema --databases > 2.sql
2、mysql -uroot -p123456 -e 'show databases;'|grep -E -v "Database|information_schema|mysql|
performance_schema" |xargs mysqldump -uroot -p123456 --databases > 3.sql
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我更喜欢第二种的写法。

下面是我写的一个备份的mysql的脚本,每天夜里执行一次。写的简单些,语句也没有做优化。


#!/bin/bash
# Description: backup mysql data
# Author: lee
FILE="mysql_`date +%F`"
BACKDIR="/mysqlbackup"
CONF_FILE="/etc/my.cnf"
mysql -uroot -e 'show databases'|egrep -v "Database|information_schema|performance_schema" \ |xargs 
mysqldump -uroot --databases > $BACKDIR/$FILE.sql && cp $CONF_FILE $BACKDIR/$FILE.cnf \
&& echo -e "Machine: Oracle\nIP: 172.16.10.12\nStatus: MySQL is backup complete" | \ mail -s 
"MySQL BackUP Complete" lee@126.com
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下图的代码看的更清楚写。

下面给大家介绍下MySQL使用mysqldump备份数据库时排除指定表


#!/bin/sh
for j in `mysql -uroot -e "USE spservice;SHOW TABLES" | grep -v Tables`
do
  case $j in
    mo_log|mt_log|report_info)
      :
      ;;
    *)
    mysqldump -uroot --default-character-set=gbk --opt spservice $j >> $j.sql
  esac
done
>>表名不固定 #!/bin/sh
for j in `mysql -uroot -e "USE spservice;SHOW TABLES" | grep -v Tables`
do
  for i in "$@"
  do
    if [ $j != $i ];then
      mysqldump -uroot --default-character-set=gbk --opt spservice $j >> $j.sql
    fi
  done
done
>>更简洁的方法
#!/bin/sh
for j in `mysql -uroot -e "USE spservice;SHOW TABLES" | grep -v Tables`
do
  echo $@ | grep -wq "\"
  if [ $? -ne 0 ];then
    mysqldump -uroot --default-character-set=gbk --opt spservice $j >> $j.sql
  fi
done
>>使用方法
sh exclude.sh mo_log mt_log report_log
#定义一个shell数组
tables=(mo_log mt_log report_log)
sh exclude.sh ${tables[@]}
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