利用MySQL的binlog恢复误删的数据库

　　查看数据库信息：
　　备份数据库：[root@localhost ~]# mysqldump -u root -p t > /mnt/t.sql Enter password:  [root@localhost ~]# ll /mnt/t.sql  -rw-r--r-- 1 root root 1771 Aug 25 11:56 /mnt/t.sql 2 开启bin_log功能
　　首先查看数据库是否开启bin_log功能mysql> show variables like ＂%log_bin%＂;
　　需要修改mysql的配置文件，/etc/的my.cnf，添加一句log_bin = mysql_bin即可
　　3 模拟误操作（插入3条数据，删除数据库）mysql> insert into t1 values (3); Query OK, 1 row affected (0.00 sec)  mysql> insert into t1 values (4); Query OK, 1 row affected (0.00 sec)  mysql> insert into t1 values (5); Query OK, 1 row affected (0.00 sec)  mysql> select * from t1; +------+ | id   | +------+ |    1 | |    2 | |    5 | |    4 | |    3 | +------+ 5 rows in set (0.00 sec)  mysql> flush logs; Query OK, 0 rows affected (0.00 sec)  mysql> show master status; +------------------+----------+--------------+------------------+ | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | +------------------+----------+--------------+------------------+ | mysql_bin.000003 |      106 |              |                  | +------------------+----------+--------------+------------------+ 1 row in set (0.00 sec)
　　删除数据：mysql> truncate t1; Query OK, 0 rows affected (0.00 sec)  mysql> select * from t1; Empty set (0.00 sec)
　　此时突然数据库损坏或者人为删除mysql> drop table t1; Query OK, 0 rows affected (0.00 sec)  mysql> show tables; Empty set (0.00 sec) 4 数据恢复
　　1 用已经备份的/mnt/t.sql来恢复数据mysql> source /mnt/t.sql; Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.01 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 2 rows affected (0.00 sec) Records: 2  Duplicates: 0  Warnings: 0  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec)  Query OK, 0 rows affected (0.00 sec) mysql> show tables; +-------------+ | Tables_in_t | +-------------+ | t1          | +-------------+ 1 row in set (0.00 sec)  mysql> select * from t1; +------+ | id   | +------+ |    1 | |    2 | +------+ 2 rows in set (0.00 sec)
　　2 还有三条数据没有恢复，怎么办。只能用bin-log来恢复[root@localhost ~]# mysqlbinlog --no-defaults /var/lib/mysql/mysql_bin.000002 | mysql -u root -p123.com t mysql> use t; 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 t1; +------+ | id   | +------+ |    1 | |    2 | |    3 | |    4 | |    5 | +------+ 5 rows in set (0.00 sec)  mysql> 5 总结
　　备份数据mysqldump -uroot -p123456 test -l -F ＂/tmp/test.sql＂ -l:读锁（只能读取，不能更新） -F:即flush logs，可以重新生成新的日志文件，当然包括log-bin日志
　　查看binlog日志mysql>show master status;
　　导入之前备份数据mysql -uroot -p t -v -f  reset master; Query OK, 0 rows affected (0.01 sec)  mysql> show master status; +------------------+----------+--------------+------------------+ | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | +------------------+----------+--------------+------------------+ | mysql-bin.000001 |      106 |              |                  | +------------------+----------+--------------+------------------+ mysql> flush logs;#关闭当前的二进制日志文件并创建一个新文件，新的二进制日志文件的名字在当前的二进制文件的编号上加1。