MySQL中怎么经过binlog日志恢复数据
发布时间：2022-02-10 14:45:11 所属栏目：MySql教程 来源：互联网
导读：本篇文章为大家展示了MySQL中怎么通过binlog日志恢复数据，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。 一、数据备份 操作的前一天晚上进行了日常逻辑备份 mysqldump -uroot -pmysql -P3306 --all-databases
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本篇文章为大家展示了MySQL中怎么通过binlog日志恢复数据，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。 一、数据备份 操作的前一天晚上进行了日常逻辑备份 mysqldump -uroot -pmysql -P3306 --all-databases > /mysql/backup/dump/alldb_bak.sql 二、模拟事故 模拟事故发生前后的业务情况 mysql> show tables; +----------------+ | Tables_in_test | +----------------+ | kk | | t1 | | t2 | | t3 | | t4 | | t5 | | t6 | | t7 | +----------------+ 8 rows in set (0.00 sec) mysql> desc t7; +-------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+----------------+ | id | int(11) | NO | PRI | NULL | auto_increment | | name | varchar(30) | YES | | NULL | | +-------+-------------+------+-----+---------+----------------+ 2 rows in set (0.00 sec) mysql> create table t8 as select * from t7; Query OK, 3 rows affected (0.17 sec) Records: 3 Duplicates: 0 Warnings: 0 mysql> select * from t8; +----+--------+ | id | name | +----+--------+ | 1 | steven | | 3 | steven | | 4 | steven | +----+--------+ 3 rows in set (0.00 sec) mysql> insert into t8 select * from t7; Query OK, 3 rows affected (0.04 sec) Records: 3 Duplicates: 0 Warnings: 0 mysql> select * from t8; +----+--------+ | id | name | +----+--------+ | 1 | steven | | 3 | steven | | 4 | steven | | 1 | steven | | 3 | steven | | 4 | steven | +----+--------+ 6 rows in set (0.00 sec) mysql> update t8 set id=2 where id=3; Query OK, 2 rows affected (0.33 sec) Rows matched: 2 Changed: 2 Warnings: 0 mysql> update t8 set id=3 where id=4; Query OK, 2 rows affected (0.03 sec) Rows matched: 2 Changed: 2 Warnings: 0 mysql> select * from t8; +----+--------+ | id | name | +----+--------+ | 1 | steven | | 2 | steven | | 3 | steven | | 1 | steven | | 2 | steven | | 3 | steven | +----+--------+ 6 rows in set (0.00 sec) mysql> drop table t8; Query OK, 0 rows affected (0.10 sec) 三、查看当前binlog mysql> show master status ; +------------------+----------+--------------+------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+------------------+-------------------+ | mysql-bin.000001 | 1344 | | | | +------------------+----------+--------------+------------------+-------------------+ 1 row in set (0.00 sec) 四、恢复数据 拷贝生产库前一天晚上的备份文件以及备份到事故期间的binlog至临时库 scp alldb_bak.sql 192.168.8.32:/mysql/backup/dump/ scp /mysql/data/mysql-bin.000001 192.168.8.32:/mysql/backup/dump/ 在临时库创建出现事故的database mysql> create database test; Query OK, 1 row affected (0.03 sec) mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | sys | | test | | testdb13 | | testdb14 | | testdb15 | | testdb16 | | testdb17 | | testdb18 | | testdb19 | | testdb20 | | testdb21 | | testdb22 | | testdb23 | | testdb24 | +--------------------+ 17 rows in set (0.00 sec) 从备份中恢复test数据库 mysql -uroot -pmysql -P3306 -o test < alldb_bak.sql -o是指单独恢复test库，忽略其他数据库 从mysql-bin.000001中查看到drop table t8之前的pos是1164 update t8 set id=3 where id=4 /*!*/; # at 1133 #181127 14:12:41 server id 330631 end_log_pos 1164 CRC32 0x1203751c Xid = 1661 COMMIT/*!*/; # at 1164 #181127 14:12:53 server id 330631 end_log_pos 1229 CRC32 0x48fad728 Anonymous_GTID last_committed=4 sequence_number=5 rbr_only=no SET @@SESSION.GTID_NEXT= 'ANONYMOUS'/*!*/; # at 1229 #181127 14:12:53 server id 330631 end_log_pos 1344 CRC32 0x2a7eb0d7 Query thread_id=3 exec_time=1 error_code=0 SET TIMESTAMP=1543299173/*!*/; DROP TABLE `t8` /* generated by server */ /*!*/; mysqlbinlog --no-defaults --stop-position=1164 --database=test mysql-bin.000001 |mysql -uroot -p test 五、根据临时库的数据，将该表恢复至生产库 六、数据验证 mysql> use test; Database changed mysql> show tables; +----------------+ | Tables_in_test | +----------------+ | kk | | t1 | | t2 | | t3 | | t4 | | t5 | | t6 | | t7 | | t8 | +----------------+ 9 rows in set (0.01 sec) mysql> select * from t8; +----+--------+ | id | name | +----+--------+ | 1 | steven | | 2 | steven | | 3 | steven | | 1 | steven | | 2 | steven | | 3 | steven | +----+--------+ 6 rows in set (0.00 sec) 上述内容就是MySQL中怎么通过binlog日志恢复数据，你们学到知识或技能了吗？ （编辑：源码网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
