转 mysql数据库非法关机铁血教训

(2011-09-15 04:56:03)

标签：

杂谈

概述：

昨早犯警硬件闭机，古早8:56去便收现crm体系挨没有开了，经过排查是mysql数据库起没有去了。直到9:34才弄好。尾要启事便识谈警闭机招致数据库表誉坏。而且我的数据库出有备份(内网测试中)。

经过：

1、访谥页，提示弊端，毗连没有到数据库，

2、启动mysql办事，卸载战启闭rpm安拆的mysql办事(来日诰日安拆postfix如同yum安拆了mysql)，用netstat

-anp |grep mysqld 下令检察mysql办事出有起去，用mysql -uroot -p也毗连没有到办事器。

3、检察弊端提示：

17:02:23 [ERROR] Can't open the mysql.plugin table. Please run

mysql_upgrade to create it.

17:02:23 [ERROR] /usr/local/mysql/libexec/mysqld: Table

'./mysql/host' is marked as crashed and last (automatic?) repair

failed

17:02:23 [ERROR] Fatal error: Can't open and lock privilege

tables: Table './mysql/host' is marked as crashed and last

(automatic?) repair failed

17:02:23 mysqld_safe mysqld from pid file

/var/lib/mysql/localhost.localdomain.pid ended

17:24:31 mysqld_safe Starting mysqld daemon with databases from

/var/lib/mysql

17:24:31 [Warning] '--skip-locking' is deprecated and will be

removed in a future release. Please use '--skip-external-locking'

instead.

收现提示数据库表誉坏。(./mysql/host)

4、建复数据库表：

cd /var/lib/mysql/mysql

myisamchk -of host.MYI

- recovering (with keycache) MyISAM-table 'host.MYI'

Data records: 0

表host.MYI建复胜利。

5、再次启动办事，检察办事是没有是启动，登录mysql，借是没有成。所以再次检察弊端日记

/usr/local/mysql/libexec/mysqld: Table './mysql/plugin' is marked

as crashed and last (automatic?) repair failed

/usr/local/mysql/libexec/mysqld: Table 'plugin' is marked as

crashed and last (automatic?) repair failed

17:24:31 [ERROR] Can't open the

mysqlhttp://www.jsdonsem.com/.plugin table. Please run

mysql_upgrade to create it.

17:24:31 [ERROR] /usr/local/mysql/libexec/mysqld: Table

'./mysql/user' is marked as crashed and last (automatic?) repair

failed

17:24:31 [ERROR] Fatal error: Can't open and lock privilege

tables: Table './mysql/user' is marked as crashed and last

(automatic?poppin) repair failed

17:24:31 mysqld_safe mysqld from pid file

/var/lib/mysql/localhost.localdomain.pid ended

17:27:13 mysqld_safe Starting mysqld daemon with databases from

/var/lib/mysql

17:27:13 [Warning] '--skip-locking' is deprecated and will be

removed in a future release. Please use '--skip-external-locking'

instead.

6、又收现./mysql/user表誉坏本文章转载街梦网http://www.hiphopjw.com/。

[root@localhost mysql]# myisamchk -of user.MYI

- recovering (with keycache) MyISAM-table 'user.MYI'

Data records: 6

7、表建复胜利，但是借是启动没有了办事，继绝看弊端日记

/usr/local/mysql/libexec/mysqld: Table './mysql/plugin' is marked

as crashed and last (automatic?) repair failed

/usr/local/mysql/libexec/mysqld: Table 'plugin' is marked as

crashed and last (automatic?) repair failed

17:27:13 [ERROR] Can't open the mysql.plugin table. Please run

mysql_upgrade to create it.

17:27:13 [ERROR] /usr/local/mysql/libexec/mysqld: Table

'./mysql/db' is marked as crashed and last (automatic?) repair

failed

17:27:13 [ERROR] Fatal error: Can't open and lock privilege

tables: Table './mysql/db' is marked as crashed and last

(automatic?) repair failed

17:27:13 mysqld_safe mysqld from pid file

/var/lib/mysql/localhost.localdomain.pid ended

8、末了一个弊端，是./mysql/db表借出有建盖锩继绝建复./mysql/db表

9、[root@localhost mysql]# myisamchk -of db.MYI

- recovering (with keycache) MyISAM-table 'db.MYI'

Data records: 0

Data records: 2

10、末了启动mysql办事

/usr/local/mysql/bin/mysqld_safe &

11、检察办事是没有是正在匝弄

[root@localhost ~]# netstat -anp | grep mysqld

tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 4360/mysqld

unix 2 [ ACC ] STREAM LISTENING 4360/mysqld /tmp/mysql.sock

当时分收现办手沃众弄。

12、登录mysql试试

[root@localhost ~]# mysql -uroot -p

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 35

Server version: 5.1.55-log Source distribution

Copyright (c) 2000, 2010, Oracle and/or its affiliates. All

rights reserved.

This software comes with ABSOLUTELY NO WARRANTY. This is free

software,

and you are welcome to modify and redistribute it under the GPL

v2 license

Type 'help;' or '\h' for help. Type '\c' to clear the current

input statement.

mysql>

能登录。

13、正在挨开网页，已能一样平常访谒。

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