MySQL 5.6.26 误删ibdata应当怎么恢复
发布时间：2022-01-13 11:48:04 所属栏目：MySql教程 来源：互联网
导读：MySQL 5.6.26 误删ibdata该怎么恢复，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。 [root@hank-yoon ~]# ps -ef | grep mysql root 1129 1 0 15:30 pts/0 00:00:00 /bin/sh /export/se
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MySQL 5.6.26 误删ibdata该怎么恢复，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。 [root@hank-yoon ~]# ps -ef | grep mysql root 1129 1 0 15:30 pts/0 00:00:00 /bin/sh /export/servers/mysql/bin/mysqld_safe --datadir=/export/data/mysql/data/ --pid-file=/export/data/mysql/mysql.pid mysql 2284 1129 2 15:30 pts/0 00:00:01 /export/servers/mysql/bin/mysqld --basedir=/export/servers/mysql --datadir=/export/data/mysql/data/ --plugin-dir=/export/servers/mysql/lib/plugin --user=mysql --log-error=/export/data/mysql/log/error.log --open-files-limit=65535 --pid-file=/export/data/mysql/mysql.pid --socket=/export/data/mysql/tmp/mysql.sock --port=3306 root 2343 1101 0 15:31 pts/0 00:00:00 grep mysql [root@hank-yoon ~]# service mysql status SUCCESS! MySQL running (2284) [root@hank-yoon ~]# cd /export/data/mysql/data/ [root@hank-yoon data]# ls a.sql binlog-rollback.pl c.sql ibdata1 ib_logfile0 ib_logfile2 mysql mysql-bin.000035 mysql-bin%Y%M%d.000001 performance_schema sakila yoon auto.cnf b.sql hank ibdata2 ib_logfile1 modify.pl mysql-bin.000034 mysql-bin.index mysql-bin%Y%M%d.index rollback.pl test [root@hank-yoon data]# rm -rf ibdata1 ibdata2 注意：无备份，误删ibdata文件，数据库千万不要重启，否则神仙下凡都没用了！ [root@hank-yoon data]# ps -ef | grep mysql root 1129 1 0 15:30 pts/0 00:00:00 /bin/sh /export/servers/mysql/bin/mysqld_safe --datadir=/export/data/mysql/data/ --pid-file=/export/data/mysql/mysql.pid mysql 2284 1129 1 15:30 pts/0 00:00:01 /export/servers/mysql/bin/mysqld --basedir=/export/servers/mysql --datadir=/export/data/mysql/data/ --plugin-dir=/export/servers/mysql/lib/plugin --user=mysql --log-error=/export/data/mysql/log/error.log --open-files-limit=65535 --pid-file=/export/data/mysql/mysql.pid --socket=/export/data/mysql/tmp/mysql.sock --port=3306 root 2362 1101 0 15:32 pts/0 00:00:00 grep mysql [root@hank-yoon data]# ll /proc/2284/fd | egrep 'ib_|ibdata' lrwx------. 1 root root 64 Jul 12 15:35 10 -> /export/data/mysql/data/ib_logfile0 lrwx------. 1 root root 64 Jul 12 15:35 11 -> /export/data/mysql/data/ib_logfile1 lrwx------. 1 root root 64 Jul 12 15:35 12 -> /export/data/mysql/data/ib_logfile2 lrwx------. 1 root root 64 Jul 12 15:35 4 -> /export/data/mysql/data/ibdata1 (deleted) lrwx------. 1 root root 64 Jul 12 15:35 9 -> /export/data/mysql/data/ibdata2 (deleted) 锁表，禁止再写入数据，以便恢复工作 [root@hank-yoon data]# mysql Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 1 Server version: 5.6.26-log Source distribution Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. root((none))> flush table with read lock; Query OK, 0 rows affected (0.00 sec) root((none))> 不能停业务，锁表后刷脏页 root((none))> flush table with read lock; Query OK, 0 rows affected (0.00 sec) root((none))> set global innodb_max_dirty_pages_pct=0; Query OK, 0 rows affected (0.00 sec) 通过show mater status确定file和position不再变化 root((none))> show master status; +------------------+----------+--------------+------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+------------------+-------------------+ | mysql-bin.000035 | 120 | | | | +------------------+----------+--------------+------------------+-------------------+ 通过root((none))> show engine innodb statusG查看是否还有写入 TRANSACTIONS ------------ Trx id counter 59143 Purge done for trx's n:o < 58676 undo n:o < 0 state: running but idle ##确保后台Purge进程把undo log全部清除掉，事务ID要一致 History list length 462 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 0, not started MySQL thread id 1, OS thread handle 0x7f5cec6eb700, query id 9 localhost root init ------------------------------------- INSERT BUFFER AND ADAPTIVE HASH INDEX ------------------------------------- Ibuf: size 1, free list len 0, seg size 2, 0 merges # insert buffer合并插入缓存等于1 merged operations: insert 0, delete mark 0, delete 0 discarded operations: insert 0, delete mark 0, delete 0 Hash table size 2365241, node heap has 0 buffer(s) 0.00 hash searches/s, 0.00 non-hash searches/s --- LOG --- Log sequence number 14149940429 Log flushed up to 14149940429 Pages flushed up to 14149940429 Last checkpoint at 14149940429 #三个值相同 ---------------------- BUFFER POOL AND MEMORY ---------------------- Total memory allocated 1098907648; in additional pool allocated 0 Dictionary memory allocated 59957 Buffer pool size 65528 Free buffers 65118 Database pages 410 Old database pages 0 Modified db pages 0 #确保脏数据为0 Pending reads 0 Pending writes: LRU 0, flush list 0, single page 0 Pages made young 0, not young 0 0.00 youngs/s, 0.00 non-youngs/s Pages read 410, created 0, written 5 0.00 reads/s, 0.00 creates/s, 0.00 writes/s No buffer pool page gets since the last printout Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 410, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] -------------- ROW OPERATIONS -------------- 0 queries inside InnoDB, 0 queries in queue 0 read views open inside InnoDB Main thread process no. 2284, id 140037101377280, state: sleeping Number of rows inserted 0, updated 0, deleted 0, read 0 0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s #确保插入，更新，删除为0 再次找到这几个文件，恢复 [root@hank-yoon data]# ll /proc/2284/fd | egrep 'ib_|ibdata' lrwx------. 1 root root 64 Jul 12 15:35 10 -> /export/data/mysql/data/ib_logfile0 lrwx------. 1 root root 64 Jul 12 15:35 11 -> /export/data/mysql/data/ib_logfile1 lrwx------. 1 root root 64 Jul 12 15:35 12 -> /export/data/mysql/data/ib_logfile2 lrwx------. 1 root root 64 Jul 12 15:35 4 -> /export/data/mysql/data/ibdata1 (deleted) lrwx------. 1 root root 64 Jul 12 15:35 9 -> /export/data/mysql/data/ibdata2 (deleted) [root@hank-yoon data]# cp /proc/2284/fd/4 /export/data/mysql/data/ibdata1 [root@hank-yoon data]# cp /proc/2284/fd/9 /export/data/mysql/data/ibdata2 修改权限 [root@hank-yoon data]# cd /export/data/mysql/data/ [root@hank-yoon data]# ls -ltr total 4980844 drwx------. 2 mysql mysql 4096 Sep 30 2015 performance_schema drwx------. 2 mysql mysql 4096 Sep 30 2015 mysql -rw-rw----. 1 mysql mysql 56 Sep 30 2015 auto.cnf drwx------. 2 mysql mysql 4096 Nov 18 2015 test -rw-r--r--. 1 root root 15886 Dec 24 2015 binlog-rollback.pl -rwxr-xr-x. 1 root root 2766 Jan 4 2016 modify.pl -rw-r--r--. 1 root root 2766 Jan 5 2016 rollback.pl drwx------. 2 mysql mysql 4096 Mar 22 21:54 hank -rw-rw----. 1 mysql mysql 25 Apr 13 10:04 mysql-bin%Y%M%d.index -rw-rw----. 1 mysql mysql 143 Apr 13 10:05 mysql-bin%Y%M%d.000001 -rw-rw----. 1 mysql mysql 268435456 Jun 21 10:07 ib_logfile1 drwx------. 2 mysql mysql 4096 Jun 21 15:02 sakila drwx------. 2 mysql mysql 4096 Jun 29 14:50 yoon -rw-r--r--. 1 root root 5087 Jun 29 14:53 a.sql -rw-r--r--. 1 root root 124 Jun 29 14:55 b.sql -rw-r--r--. 1 root root 47 Jun 29 14:56 c.sql -rw-rw----. 1 mysql mysql 2027 Jul 12 15:30 mysql-bin.000034 -rw-rw----. 1 mysql mysql 120 Jul 12 15:30 mysql-bin.000035 -rw-rw----. 1 mysql mysql 38 Jul 12 15:30 mysql-bin.index -rw-rw----. 1 mysql mysql 268435456 Jul 12 15:30 ib_logfile2 -rw-rw----. 1 mysql mysql 268435456 Jul 12 15:30 ib_logfile0 -rw-r-----. 1 root root 2147483648 Jul 12 15:55 ibdata1 -rw-r-----. 1 root root 2147483648 Jul 12 15:55 ibdata2 [root@hank-yoon data]# chown -R mysql.mysql ibdata1 ibdata2 重启登录数据库 [root@hank-yoon data]# service mysql restart Shutting down MySQL.. SUCCESS! Starting MySQL... SUCCESS! [root@hank-yoon data]# mysql Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 1 Server version: 5.6.26-log Source distribution Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. root((none))> 看完上述内容，你们掌握MySQL 5.6.26 误删ibdata该怎么恢复的方法了吗？ （编辑：PHP编程网 - 黄冈站长网） 【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! |
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