根據mysql數據庫日誌恢復刪除數據

根據mysql數據庫日誌恢復刪除數據
BINLOG就是一個記錄SQL語句的過程，和普通的LOG同樣。不過只是她是二進制存儲，普通的是十進制存儲罷了。
一、配置文件裏要寫的東西：
[mysqld]
log-bin=mysql-bin(名字能夠改爲本身的，若是不更名字的話，默認是以主機名字命名)
從新啓動MSYQL服務。
二進制文件裏面的東西顯示的就是執行全部語句的詳細記錄，固然一些語句不被記錄在內，要了解詳細的，見手冊頁。

二、查看本身的BINLOG的名字是什麼。
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

三、我作了幾回操做後，她就記錄了下來。
又一次 show binlog events 的結果。

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

四、用mysqlbinlog 工具來顯示記錄的二進制結果，而後導入到文本文件，爲了之後的恢復。
詳細過程以下：
D:\LAMP\MYSQL5\data>mysqlbinlog --start-position=4 --stop-position=106 yueliangd
ao_binglog.000001 > c:\test1.txt
test1.txt的文件內容：

/!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/;
第二行的記錄：
D:\LAMP\MYSQL5\data>mysqlbinlog --start-position=106 --stop-position=134 yuelian
gdao_binglog.000001 > c:\test1.txt
test1.txt內容以下：

/!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/;

第三行記錄：
D:\LAMP\MYSQL5\data>mysqlbinlog --start-position=134 --stop-position=254 yuelian
gdao_binglog.000001 > c:\test1.txt
內容：
/!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/;

第四行的記錄：
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/;

五、查看這些東西是爲了恢復數據，而不是爲了好玩。因此咱們最中仍是爲了要導入結果到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
進入MYSQL導入
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)
六、查看數據：
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)

將一個mysqlbinlog文件導爲sql文件
cd cd /usr/local/mysql
./mysqlbinlog /usr/local/mysql/data/mysql-bin.000001 > /opt/001.sql
將mysql-bin.000001日誌文件導成001.sql
能夠在mysqlbinlog語句中經過--start-date和--stop-date選項指定DATETIME格式的起止時間
./mysqlbinlog --stop-date="2009-04-10 17:41:28" /usr/local/mysql/data/mysql-bin.000002 > /opt/004.sql
將mysql-bin.000002文件中截止到2009-04-10 17:41:28的日誌導成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
----若是有多個binlog文件，中間用空格隔開，打上徹底路徑

./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
將mysql-bin.000002日誌文件中從2009-04-10 17:30:05到2008-04-10 17:41:28截止的sql語句導入到mysql中

說明：參考本文在真實生產環境恢復過因數據庫同步而刪除的數據庫，建議作運維的兄弟們好好看一下。在此保存以備不時之需，十分感謝做者寫出這麼妙的文章而且給我很大的幫助！

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