开发库和线上表结构有很多不一样，分表个数也不同，我需要重新整理保持开发库和线上一致，之前已经告知开发数据是否允许丢失，开发说数据可以不要了，直接丢掉，等我搞好之后开发告诉我部分数据（ring）是不能删除的，我晕，只好想办法来恢复数据了，没有备份，不过还好有全部的binlog。
1.根据binlog解析出所有ring数据库的所有sql
[mysql@DEV_SNS1 log]$mysqlbinlog –no-defaults –database=ring –start-datetime=”2005-04-20 9:55:00″ –stop-datetim=”2009-04-08 08:05:00″ /u01/mysql/log/mysql-bin.000005 > /u01/mysql/log/mysql_restore5.sql
[mysql@DEV_SNS1 log]$ ls -l /u01/mysql/log/mysql_restore5.sql
-rw-r–r– 1 mysql dba 407 Apr 8 15:33 /u01/mysql/log/mysql_restore5.sql
–start-datetime=datetime 从哪个点开始解析
–stop-datetim=datetime 从哪个点停止解析
–database=ring 指定需要解析哪个数据库，只提取某个数据库的sql语句
–如果有多个binlog的话需要解析多次，需要解析所有的binlog
2.重新在数据库中执行
[mysql@DEV_SNS1 log]$mysql -u root <mysql_restore5.sql
ERROR 1062 (23000) at line 2559580: Duplicate entry ’175754263-140′ for key 1 –恢复过程中出现主键冲突，导入失败
3.删除已经恢复的数据，重新恢复一遍
[mysql@DEV_SNS1 log]$ mysql -u root
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 7647
Server version: 5.0.67-log Source distribution
Type ‘help;’ or ‘h’ for help. Type ‘c’ to clear the buffer.
root@(none) 02:55:41>drop database ring;
Query OK, 8 rows affected (0.04 sec)
[mysql@DEV_SNS1 log]$ mysql -u root -f <mysql_restore5.sql —f：忽略错误并继续
ERROR 1062 (23000) at line 2559580: Duplicate entry ’175754263-140′ for key 1
ERROR 1062 (23000) at line 2564671: Duplicate entry ’138′ for key 1
ERROR 1062 (23000) at line 2566216: Duplicate entry ’139′ for key 1
ERROR 1062 (23000) at line 2566224: Duplicate entry ’140′ for key 1
ERROR 1062 (23000) at line 2566232: Duplicate entry ’141′ for key 1
ERROR 1062 (23000) at line 2566240: Duplicate entry ’142′ for key 1
ERROR 1062 (23000) at line 2648410: Duplicate entry ’143′ for key 1
ERROR 1062 (23000) at line 2648418: Duplicate entry ’144′ for key 1
ERROR 1062 (23000) at line 2648581: Duplicate entry ’145′ for key 1
ERROR 1062 (23000) at line 2648589: Duplicate entry ’146′ for key 1
ERROR 1062 (23000) at line 2648597: Duplicate entry ’147′ for key 1
ERROR 1062 (23000) at line 2648605: Duplicate entry ’148′ for key 1
ERROR 1062 (23000) at line 2649279: Duplicate entry ’149′ for key 1
ERROR 1062 (23000) at line 2649287: Duplicate entry ’150′ for key 1
ERROR 1062 (23000) at line 2649295: Duplicate entry ’151′ for key 1
ERROR 1062 (23000) at line 2649303: Duplicate entry ’152′ for key 1
ERROR 1062 (23000) at line 2649311: Duplicate entry ’153′ for key 1
ERROR 1062 (23000) at line 2649319: Duplicate entry ’154′ for key 1
ERROR 1062 (23000) at line 2649327: Duplicate entry ’155′ for key 1
ERROR 1062 (23000) at line 2649335: Duplicate entry ’156′ for key 1
恢复成功，有部分数据冲突需要开发自己去处理了。
总的来说，不管是否重要，因为重要性很多时候我们自己是无法评定的，大操作之前一定先做好备份，备份才是王道。