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根据mysql数据库日志恢复删除数据

2017-12-01 18:00 561 查看
根据mysql数据库日志恢复删除数据
BINLOG就是一个记录SQL语句的过程,和普通的LOG一样。不过只是她是二进制存储,普通的是十进制存储罢了。
1、配置文件里要写的东西:
[mysqld]
log-bin=mysql-bin(名字可以改成自己的,如果不改名字的话,默认是以主机名字命名)
重新启动MSYQL服务。
二进制文件里面的东西显示的就是执行所有语句的详细记录,当然一些语句不被记录在内,要了解详细的,见手册页。

2、查看自己的BINLOG的名字是什么。
show binlog events;
query result(1 records)
Log_name Pos Event_type Server_id End_log_pos Info
yueliangdao_binglog.000001 4 Format_desc 1 106 Server ver: 5.1.22-rc-community-log, Binlog ver: 4

3、我做了几次操作后,她就记录了下来。
又一次 show binlog events 的结果。

query result(4 records)

Log_name Pos Event_type Server_id End_log_pos Info
yueliangdao_binglog.000001 4 Format_desc 1 106 Server ver: 5.1.22-rc-community-log, Binlog ver: 4
yueliangdao_binglog.000001 106 Intvar 1 134 INSERT_ID=1
yueliangdao_binglog.000001 134 Query 1 254 use
test
; create table a1(id int not null auto_increment primary key, str varchar(1000)) engine=myisam
yueliangdao_binglog.000001 254 Query 1 330 use
test
; insert into a1(str) values ('I love you'),('You love me')
yueliangdao_binglog.000001 330 Query 1 485 use
test
; drop table a1

4、用mysqlbinlog 工具来显示记录的二进制结果,然后导入到文本文件,为了以后的恢复。
详细过程如下:
D:\LAMP\MYSQL5\data>mysqlbinlog --start-position=4 --stop-position=106 yueliangd
ao_binglog.000001 > c:\test1.txt
test1.txt的文件内容:

/!40019 SET @@session.max_insert_delayed_threads=0/;
/!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0/;
DELIMITER /!/;

at 4

#7122 16:9:18 server id 1 end_log_pos 106 Start: binlog v 4, server v 5.1.22-rc-community-log created 7122 16:9:18 at startup

Warning: this binlog was not closed properly. Most probably mysqld crashed writing it.

ROLLBACK/!/;
DELIMITER ;

End of log file

ROLLBACK / added by mysqlbinlog /;
/!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE/;
第二行的记录:
D:\LAMP\MYSQL5\data>mysqlbinlog --start-position=106 --stop-position=134 yuelian
gdao_binglog.000001 > c:\test1.txt
test1.txt内容如下:

/!40019 SET @@session.max_insert_delayed_threads=0/;
/!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0/;
DELIMITER /!/;

at 106

#7122 16:22:36 server id 1 end_log_pos 134 Intvar
SET INSERT_ID=1/!/;
DELIMITER ;

End of log file

ROLLBACK / added by mysqlbinlog /;
/!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE/;

第三行记录:
D:\LAMP\MYSQL5\data>mysqlbinlog --start-position=134 --stop-position=254 yuelian
gdao_binglog.000001 > c:\test1.txt
内容:
/!40019 SET @@session.max_insert_delayed_threads=0/;
/!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0/;
DELIMITER /!/;

at 134

#7122 16:55:31 server id 1 end_log_pos 254 Query thread_id=1 exec_time=0 error_code=0
use test/!/;
SET TIMESTAMP=1196585731/!/;
SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1/!/;
SET @@session.sql_mode=1344274432/!/;
/!\C utf8 //!/;
SET @@session.character_set_client=33,@@session.collation_connection=33,@@session.collation_server=33/!/;
create table a1(id int not null auto_increment primary key,
str varchar(1000)) engine=myisam/!/;
DELIMITER ;

End of log file

ROLLBACK / added by mysqlbinlog /;
/!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE/;

/!40019 SET @@session.max_insert_delayed_threads=0/;

第四行的记录:
D:\LAMP\MYSQL5\data>mysqlbinlog --start-position=254 --stop-position=330 yuelian
gdao_binglog.000001 > c:\test1.txt
/!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0/;
DELIMITER /!/;

at 254

#7122 16:22:36 server id 1 end_log_pos 330 Query thread_id=1 exec_time=0 error_code=0
use test/!/;
SET TIMESTAMP=1196583756/!/;
SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1/!/;
SET @@session.sql_mode=1344274432/!/;
/!\C utf8 //!/;
SET @@session.character_set_client=33,@@session.collation_connection=33,@@session.collation_server=33/!/;
use
test
; insert into a1(str) values ('I love you'),('You love me')/!/;
DELIMITER ;

End of log file

ROLLBACK / added by mysqlbinlog /;
/!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE/;

5、查看这些东西是为了恢复数据,而不是为了好玩。所以我们最中还是为了要导入结果到MYSQL中。

D:\LAMP\MYSQL5\data>mysqlbinlog --start-position=134 --stop-position=330 yuelian
gdao_binglog.000001 | mysql -uroot -p

或者
D:\LAMP\MYSQL5\data>mysqlbinlog --start-position=134 --stop-position=330 yuelian
gdao_binglog.000001 >test1.txt
进入MYSQL导入
mysql> source c:\test1.txt
Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Database changed
Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Charset changed
Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.03 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)
6、查看数据:
mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
| a1 |
+----------------+
1 row in set (0.01 sec)

mysql> select * from a1;
+----+-------------+
| id | str |
+----+-------------+
| 1 | I love you |
| 2 | You love me |
+----+-------------+
2 rows in set (0.00 sec)

将一个mysqlbinlog文件导为sql文件
cd cd /usr/local/mysql
./mysqlbinlog /usr/local/mysql/data/mysql-bin.000001 > /opt/001.sql
将mysql-bin.000001日志文件导成001.sql
可以在mysqlbinlog语句中通过--start-date和--stop-date选项指定DATETIME格式的起止时间
./mysqlbinlog --stop-date="2009-04-10 17:41:28" /usr/local/mysql/data/mysql-bin.000002 > /opt/004.sql
将mysql-bin.000002文件中截止到2009-04-10 17:41:28的日志导成004.sql

./mysqlbinlog --start-date="2009-04-10 17:30:05" --stop-date="2009-04-10 17:41:28" /usr/local/mysql/data/mysql-bin.000002 /usr/local/mysql/data/mysql-bin.0000023> /opt/004.sql
----如果有多个binlog文件,中间用空格隔开,打上完全路径

./mysqlbinlog --start-date="2009-04-10 17:30:05" --stop-date="2009-04-10 17:41:28" /usr/local/mysql/data/mysql-bin.000002 |mysql -u root -p123456
或者 source /opt/004.sql
将mysql-bin.000002日志文件中从2009-04-10 17:30:05到2008-04-10 17:41:28截止的sql语句导入到mysql中

说明:参考本文在真实生产环境恢复过因数据库同步而删除的数据库,建议做运维的兄弟们好好看一下。在此保存以备不时之需,十分感谢作者写出这么妙的文章并且给我很大的帮助!

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