再谈MySQL全库备份
再谈MySQL全库备份
简介
Part1:写在最前
在很早之前，我写过一个MySQL生产库全库备份脚本，今天有同事问我是不是要再加一个-R参数来备份存储过程，理由的话是由于mysqldump --help中 关于存储过程的默认备份是false。
routines FALSE
MySQL生产库全库备份脚本
http://suifu.blog.51cto.com/9167728/1758022
实战
Part1:写在最前
我备份一般就三个参数
--single-transaction-A --master-data=2
分别是预防锁，全库备份和记录复制信息
有人问单库怎么恢复？可以移步
从MySQL全库备份中恢复某个库和某张表
http://suifu.blog.51cto.com/9167728/1830651
Part2:创建存储过程
# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor.Commands end with ; or \g.
Your MySQL connection id is 7
Server version: 5.6.25-log MySQL Community Server (GPL)
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> create database helei;
Query OK, 1 row affected (0.02 sec)
mysql> use helei;
Database changed
mysql> create table helei(
-> id int(10) unsigned NOT NULL AUTO_INCREMENT,
-> c1 int(10) NOT NULL DEFAULT '0',
-> c2 int(10) unsigned DEFAULT NULL,
-> c5 int(10) unsigned NOT NULL DEFAULT '0',
-> c3 timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
-> c4 varchar(200) NOT NULL DEFAULT '',
-> PRIMARY KEY(id),
-> KEY idx_c1(c1),
-> KEY idx_c2(c2)
-> )ENGINE=InnoDB ;
Query OK, 0 rows affected (0.02 sec)
mysql> delimiter $$
mysql> drop procedure if exists `insert_helei` $$
and()*row_num),now(),repeat('su', floor(rand()*20)));
set i = i+1;
END while;
end$$Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> create procedure `insert_helei`(in row_num int )
-> begin
->declare i intdefault 0;
->while i < row_num do
-> insert into helei(c1, c2, c5,c3, c4) values( floor(rand()*row_num),floor(rand()*row_num),floor(rand()*row_num),now(),repeat('su', floor(rand()*20)));
-> set i = i+1;
->END while;
->
-> end$$
Query OK, 0 rows affected (0.00 sec)
mysql>
Part3:执行不同的备份脚本
参数分别是
--single-transaction -A --master-data=2
--single-transaction -A -R--master-data=2
Part4:对比SQL文件
可以发现加了-R的文件中记录了创建存储过程的SQL语句，没加-R的没有记录。
-- Dumping routines for database 'helei'
--
/*!50003 DROP PROCEDURE IF EXISTS `insert_helei` */;
/*!50003 SET @saved_cs_client = @@character_set_client */ ;
/*!50003 SET @saved_cs_results = @@character_set_results */ ;
/*!50003 SET @saved_col_connection = @@collation_connection */ ;
/*!50003 SET character_set_client= utf8 */ ;
/*!50003 SET character_set_results = utf8 */ ;
/*!50003 SET collation_connection= utf8_general_ci */ ;
/*!50003 SET @saved_sql_mode = @@sql_mode */ ;
/*!50003 SET sql_mode = 'STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION' */ ;
DELIMITER ;;
CREATE DEFINER=`root`@`localhost` PROCEDURE `insert_helei`(in row_num int )
begin
declare i intdefault 0;
while i < row_num do
insert into helei(c1, c2, c5,c3, c4) values( floor(rand()*row_num),floor(rand()*row_num),floor(rand()*row_num),now(),repeat('su', floor(rand()*20)));
set i = i+1;
END while;
end ;;
DELIMITER ;
/*!50003 SET sql_mode = @saved_sql_mode */ ;
/*!50003 SET character_set_client= @saved_cs_client */ ;
/*!50003 SET character_set_results = @saved_cs_results */ ;
/*!50003 SET collation_connection= @saved_col_connection */ ;
验证
Part1:验证
清空linux环境，重装mysql，导入不带-R参数即不带创建存储过程SQL的备份文件
# mysql -uroot -p < Master_db_201612051722.sql
Enter password:
# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor.Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 5.6.25-log MySQL Community Server (GPL)
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> use helei;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> select * from helei;
Empty set (0.00 sec)
mysql> call insert_helei(5);
Query OK, 1 row affected (0.01 sec)
mysql> select * from helei;
+----+----+------+----+---------------------+------------------------------------+
| id | c1 | c2 | c5 | c3 | c4 |
+----+----+------+----+---------------------+------------------------------------+
|1 |1 | 2 |0 | 2016-12-05 17:51:37 | sususususususususususu |
|2 |2 | 1 |0 | 2016-12-05 17:51:37 | sususususususususususususususususu |
|3 |4 | 1 |3 | 2016-12-05 17:51:37 | sususususususususususu |
|4 |3 | 2 |3 | 2016-12-05 17:51:37 | sususususususususususu |
|5 |0 | 2 |4 | 2016-12-05 17:51:37 | sususususususususu |
+----+----+------+----+---------------------+------------------------------------+
5 rows in set (0.00 sec)
mysql>
发现即便没有添加-R参数，也依然可以调用之前创建的存储过程。
——总结——
存储过程存储在mysql.proc表中，而笔者由于采用了-A全库备份的策略，即包含mysql库，所以存储过程也得以备份。-R参数一般用于单库备份或者多库备份。由于笔者的水平有限，编写时间也很仓促，文中难免会出现一些错误或者不准确的地方，不妥之处恳请读者批评指正。
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