mysql誤刪資料後快速回滾
阿新 • • 發佈:2018-11-10
binlog2sql快速回滾
首先,確認你的MySQL server開啟了binlog,設定了以下引數:
[mysqld] server-id = 1 log_bin = /var/log/mysql/mysql-bin.log max_binlog_size = 1000M binlog-format = row
如果沒有開啟binlog,也沒有預先生成回滾SQL,那真的無法快速回滾了。對存放重要業務資料的MySQL,強烈建議開啟binlog。
隨後,安裝開源工具binlog2sql。binlog2sql是一款簡單易用的binlog解析工具,其中一個功能就是生成回滾SQL。
git clone https://github.com/danfengcao/binlog2sql.git pip install -r requirements.txt
然後,我們就可以生成回滾SQL了。
背景:誤刪了test庫f表整張表的資料,需要緊急回滾。
原有資料 mysql> select * from f; +-----+-----+---------------------+ | uid | did | updateTime | +-----+-----+---------------------+ | 1 | 18 | 2016-12-06 12:28:18 | | 2 | 19 | 2016-12-06 12:55:56 | | 3 | 20 | 2016-12-07 14:00:58 | | 4 | 21 | 2016-12-07 14:01:00 | +-----+-----+---------------------+ 誤操作 mysql> delete from f; Query OK, 4 rows affected (0.00 sec) f表被清空 mysql> select * from f; Empty set (0.00 sec)
回滾步驟:
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登入mysql,檢視目前的binlog檔案
mysql> show master logs; +------------------+-----------+ | Log_name | File_size | +------------------+-----------+ | mysql-bin.000001 | 12262268 | | mysql-bin.000002 | 132776 | +------------------+-----------+
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最新的binlog檔案是mysql-bin.000002,我們再定位誤操作SQL的binlog位置
$ python binlog2sql/binlog2sql.py -h127.0.0.1 -P3306 -uadmin -p'admin' -dtest -t f --start-file='mysql-bin.000002' 輸出: DELETE FROM `test`.`f` WHERE `did`=18 AND `updateTime`='2016-12-06 12:28:18' AND `uid`=1 LIMIT 1; #start 4 end 314 DELETE FROM `test`.`f` WHERE `did`=19 AND `updateTime`='2016-12-06 12:55:56' AND `uid`=2 LIMIT 1; #start 4 end 314 DELETE FROM `test`.`f` WHERE `did`=20 AND `updateTime`='2016-12-07 14:00:58' AND `uid`=3 LIMIT 1; #start 4 end 314 DELETE FROM `test`.`f` WHERE `did`=21 AND `updateTime`='2016-12-07 14:01:00' AND `uid`=4 LIMIT 1; #start 4 end 314
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生成回滾sql,並檢查回滾sql是否正確
$ python binlog2sql/binlog2sql.py -h127.0.0.1 -P3306 -uadmin -p'admin' -dtest -t f --start-file='mysql-bin.000002' --start-pos=4 --end-pos=314 -B 輸出: INSERT INTO `test`.`f`(`did`, `updateTime`, `uid`) VALUES (21, '2016-12-07 14:01:00', 4); #start 4 end 314 INSERT INTO `test`.`f`(`did`, `updateTime`, `uid`) VALUES (20, '2016-12-07 14:00:58', 3); #start 4 end 314 INSERT INTO `test`.`f`(`did`, `updateTime`, `uid`) VALUES (19, '2016-12-06 12:55:56', 2); #start 4 end 314 INSERT INTO `test`.`f`(`did`, `updateTime`, `uid`) VALUES (18, '2016-12-06 12:28:18', 1); #start 4 end 314
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確認回滾sql正確,執行回滾語句。登入mysql,資料回滾成功。
$ python binlog2sql.py -h127.0.0.1 -P3306 -uadmin -p'admin' -dtest -t f --start-file='mysql-bin.000002' --start-pos=4 --end-pos=314 -B | mysql -h127.0.0.1 -P3306 -uadmin -p'admin' mysql> select * from f; +-----+-----+---------------------+ | uid | did | updateTime | +-----+-----+---------------------+ | 1 | 18 | 2016-12-06 12:28:18 | | 2 | 19 | 2016-12-06 12:55:56 | | 3 | 20 | 2016-12-07 14:00:58 | | 4 | 21 | 2016-12-07 14:01:00 | +-----+-----+---------------------+