Mysql中误删ibdata ib_logfile等文件咋整
发布时间：2021-12-28 18:12:13 所属栏目：MySql教程 来源：互联网
导读：这篇文章主要介绍了Mysql中误删ibdata ib_logfile等文件怎么办，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。 背景：误删ibdata等文件 [root@localhost /var/lib/mysql ]# rm -rf ib* i
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这篇文章主要介绍了Mysql中误删ibdata ib_logfile等文件怎么办，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。 背景：误删ibdata等文件 [root@localhost /var/lib/mysql ]# rm -rf ib* ib_buffer_pool ibdata1 ib_logfile0 ib_logfile1 ibtmp1 此时不要惊慌，因为mysql还是在运行的，也行进行操作，，如果关了mysql那就没办法了，恢复步骤如下 1.关闭所有业务写入 flush tables with read lock 2.查看mysql的pid号 [root@localhost /var/lib/mysql ]# ps -ef | grep -i mysql root 386 1 0 May06 ? 00:00:00 /bin/sh /usr/local/mariadb/bin/mysqld_safe --defaults-file=/usr/local/mariadb/my.cnf mysql 491 386 0 May06 ? 00:16:13 /usr/local/mariadb/bin/mysqld --defaults-file=/usr/local/mariadb/my.cnf --basedir=/usr/local/mariadb --datadir=/usr/local/mariadb/demo --plugin-dir=/usr/local/mariadb/lib/plugin --user=mysql --log-error=/usr/local/mariadb/demo/mardb.err --pid-file=/usr/local/mariadb/demo/mardb.pid --socket=/usr/local/mariadb/demo/mardb.socket --port=3333 root 14790 1 0 14:06 ? 00:00:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --socket=/var/lib/mysql/mysql.sock --pid-file=/var/run/mysqld/mysqld.pid --basedir=/usr --user=mysql mysql 15010 14790 0 14:06 ? 00:00:05 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --log-error=/var/log/mysqld.log --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/lib/mysql/mysql.sock root 18180 17974 0 15:03 pts/3 00:00:00 grep -i mysql [root@localhost /var/lib/mysql ]# netstat -nputl|grep -i mysql tcp 0 0 :::3333 :::* LISTEN 491/mysqld tcp 0 0 :::3306 :::* LISTEN 15010/mysqld 3 进入linux系统自带的虚拟目录proc查看文件是否还存在 [root@localhost /var/lib/mysql ]# ll /proc/15010/fd | grep -i 'ib' lrwx------ 1 root root 64 May 12 15:03 10 -> /var/lib/mysql/ibtmp1 (deleted) lrwx------ 1 root root 64 May 12 15:03 3 -> /var/lib/mysql/ibdata1 (deleted) lrwx------ 1 root root 64 May 12 15:03 8 -> /var/lib/mysql/ib_logfile0 (deleted) lrwx------ 1 root root 64 May 12 15:03 9 -> /var/lib/mysql/ib_logfile1 (deleted) 4.输入命令让脏快速度刷新到磁盘 mysql> set global innodb_max_dirty_pages_pct=0; 5 确保binlog pos和file不变 mysql> show master status; +------------------+-----------+--------------+------------------+--------------------------------------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+-----------+--------------+------------------+--------------------------------------------------+ | mysql-bin.000176 | 449250839 | | | 6c8a10ed-ed0b-11e4-91eb-00163ec546ca:1-212063619 | +------------------+-----------+--------------+------------------+--------------------------------------------------+ 1 row in set (0.00 sec) 6.查看engine innodb的信息 如： mysql> show engine innodb statusG; *************************** 1. row *************************** Type: InnoDB Name: Status: ===================================== 2016-05-12 15:25:55 0x7f7692d0e700 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 10 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 35 srv_active, 0 srv_shutdown, 585 srv_idle srv_master_thread log flush and writes: 620 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 17 OS WAIT ARRAY INFO: signal count 15 RW-shared spins 0, rounds 63, OS waits 6 RW-excl spins 0, rounds 11, OS waits 0 RW-sx spins 0, rounds 0, OS waits 0 Spin rounds per wait: 63.00 RW-shared, 11.00 RW-excl, 0.00 RW-sx ------------ TRANSACTIONS ------------ Trx id counter 3625 Purge done for trx's n:o < 3625 undo n:o < 0 state: running but idle ==确认后台进程吧undo log全部清除掉，事物id要一致 History list length 71 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 421622043023184, not started 0 lock struct(s), heap size 1136, 0 row lock(s) -------- FILE I/O -------- I/O thread 0 state: waiting for completed aio requests (insert buffer thread) I/O thread 1 state: waiting for completed aio requests (log thread) I/O thread 2 state: waiting for completed aio requests (read thread) I/O thread 3 state: waiting for completed aio requests (read thread) I/O thread 4 state: waiting for completed aio requests (read thread) I/O thread 5 state: waiting for completed aio requests (read thread) I/O thread 6 state: waiting for completed aio requests (write thread) I/O thread 7 state: waiting for completed aio requests (write thread) I/O thread 8 state: waiting for completed aio requests (write thread) I/O thread 9 state: waiting for completed aio requests (write thread) Pending normal aio reads: [0, 0, 0, 0] , aio writes: [0, 0, 0, 0] , ibuf aio reads:, log i/o's:, sync i/o's: Pending flushes (fsync) log: 0; buffer pool: 0 459 OS file reads, 134 OS file writes, 55 OS fsyncs 0.00 reads/s, 0 avg bytes/read, 0.00 writes/s, 0.00 fsyncs/s ------------------------------------- INSERT BUFFER AND ADAPTIVE HASH INDEX ------------------------------------- Ibuf: size 1, free list len 0, seg size 2, 0 merges ===合并插入 insert buffer为1 merged operations: insert 0, delete mark 0, delete 0 discarded operations: insert 0, delete mark 0, delete 0 Hash table size 34679, node heap has 0 buffer(s) Hash table size 34679, node heap has 0 buffer(s) Hash table size 34679, node heap has 0 buffer(s) Hash table size 34679, node heap has 0 buffer(s) Hash table size 34679, node heap has 0 buffer(s) Hash table size 34679, node heap has 0 buffer(s) Hash table size 34679, node heap has 0 buffer(s) Hash table size 34679, node heap has 0 buffer(s) 0.00 hash searches/s, 0.00 non-hash searches/s --- LOG --- Log sequence number 14905664 Log flushed up to 14905664 Pages flushed up to 14905664 Last checkpoint at 14905655 ===确保三个日志记录不再变化 0 pending log flushes, 0 pending chkp writes 55 log i/o's done, 0.00 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total large memory allocated 137428992 Dictionary memory allocated 371621 Buffer pool size 8192 Free buffers 7862 Database pages 330 Old database pages 0 Modified db pages 0 ====确认脏页书数量为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 296, created 34, written 72 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: 330, 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 Process ID=19640, Main thread ID=140146326370048, state: sleeping Number of rows inserted 34, updated 0, deleted 0, read 9 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 ---------------------------- END OF INNODB MONITOR OUTPUT ============================ 1 row in set (0.00 sec) ERROR: No query specified 6.将文件恢复并修改权限 [root@localhost /proc/15010/fd ]# cp 10 /var/lib/mysql/ibtmp1 [root@localhost /proc/15010/fd ]# cp 3 /var/lib/mysql/ibdata1 [root@localhost /proc/15010/fd ]# cp 8 /var/lib/mysql/ib_logfile0 [root@localhost /proc/15010/fd ]# cp 9 /var/lib/mysql/ib_logfile1 [root@localhost /proc/15010/fd ]# chown mysql.mysql /var/lib/mysql/ibtmp1 [root@localhost /proc/15010/fd ]# chown mysql.mysql /var/lib/mysql/ibdata1 [root@localhost /proc/15010/fd ]# chown mysql.mysql /var/lib/mysql/ib_logfile* 7。重启mysql即可 感谢你能够认真阅读完这篇文章，希望小编分享的“Mysql中误删ibdata ib_logfile等文件怎么办”这篇文章对大家有帮助。 （编辑：晋中站长网） 【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! |
