mysql的binlog

mysql> show global variables like '%bin%';

+---------------------------------+----------------------+

| Variable_name                   | Value                |

+---------------------------------+----------------------+

| binlog_cache_size               | 32768                |

| innodb_locks_unsafe_for_binlog  | OFF                  |

| log_bin                         | ON                   |

| log_bin_trust_function_creators | OFF                  |

| max_binlog_cache_size           | 18446744073709547520 |

| max_binlog_size                 | 104857600            |

| sync_binlog                     | 0                    |

+---------------------------------+----------------------+

7 rows in set (0.00 sec)

如果使用了配置文件，则可以修改 /etc/my.cnf 把里面的log-bin这一行注释掉，重启mysql服务即可关闭bin日志的记录。

如果没有主从复制，可以通过reset master的方式，重置数据库日志，清除之前的日志文件：

mysql> reset master;

Query OK, 0 rows affected (8.51 sec)

但是如果存在复制关系，应当通过PURGE的方式来清理bin日志：

语法如下：

PURGE {MASTER | BINARY} LOGS TO 'log_name'

PURGE {MASTER | BINARY} LOGS BEFORE 'date'



　　用于删除列于在指定的日志或日期之前的日志索引中的所有二进制日志。这些日志也会从记录在日志索引文件中的清单中被删除，这样被给定的日志成为第一个。



　　例如：



　　PURGE MASTER LOGS TO 'mysql-bin.010';

　　PURGE MASTER LOGS BEFORE '2008-06-23 15:00:00';

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