MySQL数据库的备份与恢复(5)——编写一个简单的mysqldump分库备份脚本
编写一个脚本,用于备份除了information_schema和performance_schema数据库之外的所有数据库,每个数据库生成一个sql文件。
step1、取出MySQL包含的所有数据库名称
[root@Mysql11 tmp]# mysql -uroot -p123456 -e "show databases;"
mysql: [Warning] Using a password on the command line interface can be insecure.
+--------------------+
| Database |
+--------------------+
| information_schema |
| hist |
| mysql |
| performance_schema |
| sys |
| wanggx |
+--------------------+
step2、过滤掉系统数据库和标题行
[root@Mysql11 tmp]# mysql -uroot -p123456 -e "show databases;"|grep -Evi "database|information|performance"
mysql: [Warning] Using a password on the command line interface can be insecure.
hist
mysql
sys
wanggx
step3、编写脚本
vim backup.sh
脚本的内容如下:
### 利用for循环取出所有的数据库名称,具体的原理参见step1和step2
for dbname in `mysql -uroot -p123456 -e "show databases;"|grep -Evi "database|infor|perfor"`
do
### 针对每个数据库名称生成相应的mysqldump命令
mysqldump -uroot -p123456 --events -B $dbname|gzip > /tmp/${dbname}_bak.sql.gz
done
step4、为脚本增加可执行权限
[root@Mysql11 tmp]# pwd
/tmp
[root@Mysql11 tmp]# vim backup.sh
[root@Mysql11 tmp]# chmod +x backup.sh
[root@Mysql11 tmp]# ll
总用量 4
-rwxr-xr-x. 1 root root 184 7月 2 15:09 backup.sh
step5、执行脚本,查看执行结果
[root@Mysql11 tmp]# ./backup.sh
mysql: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
[root@Mysql11 tmp]# ls
backup.sh hist_bak.sql.gz mysql_bak.sql.gz sys_bak.sql.gz wanggx_bak.sql.gz