MySQL数据库的备份与恢复（6）——编写一个mysqldump分表备份脚本

MySQL数据库的备份与恢复（6）——编写一个mysqldump分表备份脚本

编写一个脚本，用于备份某个数据库中所有的数据表，每个数据表生成一个sql文件。

step1、取出hist数据库包含的所有表的名称

[root@Mysql11 tmp]# mysql -uroot -p123456 hist -e "show tables;"
mysql: [Warning] Using a password on the command line interface can be insecure.
+----------------+
| Tables_in_hist |
+----------------+
| course         |
| dept           |
| score          |
| stu            |
| t1             |
+----------------+

step2、过滤掉标题行

[root@Mysql11 tmp]# mysql -uroot -p123456 hist -e "show tables;"|grep -Evi "table"
mysql: [Warning] Using a password on the command line interface can be insecure.
course
dept
score
stu
t1

step3、编写脚本

vim backup_tables.sh

脚本的内容如下：

### 利用for循环取出数据库中所有的表名称，具体的原理参见step1和step2
for tablename in `mysql -uroot -p123456 hist -e "show tables;"|grep -Evi "table"`
do
    ### 针对每个表名称生成相应的mysqldump命令
    mysqldump -uroot -p123456 --events hist $tablename|gzip > /tmp/${tablename}_bak.sql.gz
done

step4、为脚本增加可执行权限

[root@Mysql11 tmp]# pwd
/tmp
[root@Mysql11 tmp]# chmod +x backup_tables.sh
[root@Mysql11 tmp]# ll
总用量 4
-rwxr-xr-x. 1 root root 184 7月   2 15:37 backup_tables.sh

step5、执行脚本，查看执行结果

[root@Mysql11 tmp]# ./backup_tables.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.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
[root@Mysql11 tmp]# ls
backup_tables.sh  course_bak.sql.gz  dept_bak.sql.gz  score_bak.sql.gz  stu_bak.sql.gz  t1_bak.sql.gz