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  • Mysql生产案例

    Mysql生产案例

    在没有备份数据的情况下,突然断电导致表损坏的修复方法。
    
    [root@db01 ~]# cd  /usr/local/mysql/data 
    
    #打包库目录
    [root@db01 data]# tar czf world.tar.gz world
    
    #查看库目录
    [root@db01 data]# ll /usr/local/mysql/data 
    total 227524
    drwx------ 2 mysql mysql      144 Jul 16 09:58 world
    -rw-r--r-- 1 root  root    164896 Jul 16 19:18 world.tar.gz
    
    #将打包好的world库目录远程拷贝到db04(10.0.0.53)
    [root@db01 data]# scp world.tar.gz 10.0.0.53:/tmp/
    The authenticity of host '10.0.0.53 (10.0.0.53)' can't be established.
    ECDSA key fingerprint is SHA256:KUGHqLcxD0N8xp81uH8qyAu+/AndEmwYkCYOC0K8CfQ.
    ECDSA key fingerprint is MD5:cb:6c:73:26:13:95:05:a0:60:24:e3:c6:cb:c3:e6:b5.
    Are you sure you want to continue connecting (yes/no)? yes
    Warning: Permanently added '10.0.0.53' (ECDSA) to the list of known hosts.
    root@10.0.0.53's password: 
    world.tar.gz                                                                     100%  
    161KB  31.6MB/s   
    
    #在db04上查看库目录包是否过来
    [root@db04 data]# ll
    total 110776
    -rw-r--r-- 1 root  root    164896 Jul 16 19:19 world.tar.gz
    
    #解压库目录包
    [root@db04 data]# tar xf world.tar.gz 
    
    #启动数据库
    [root@db04 data]# /etc/init.d/mysqld start
    
    #登录数据库查看
    mysql> show databases;
    
    #查询表中数据
    mysql> select * from city;
    ERROR 1146 (42S02): Table 'world.city' doesn't exist
    
    #找到以前的表结构在新库中创建表
    mysql> show create table world.city;
    ##删除外键创建语句
    
    CREATE TABLE `city_new` (
      `ID` int(11) NOT NULL AUTO_INCREMENT,
      `Name` char(35) NOT NULL DEFAULT '',
      `CountryCode` char(3) NOT NULL DEFAULT '',
      `District` char(20) NOT NULL DEFAULT '',
      `Population` int(11) NOT NULL DEFAULT '0',
      PRIMARY KEY (`ID`),
      KEY `CountryCode` (`CountryCode`)
    ) ENGINE=InnoDB AUTO_INCREMENT=4080 DEFAULT CHARSET=latin1;
    
    #查询表数据
    mysql> select * from city_new;
    Empty set (0.00 sec)
    
    #删除表空间
    mysql> alter table city_new discard tablespace;
    Query OK, 0 rows affected (0.01 sec)
    
    #拷贝旧表空间文件
    [root@db04 world]# cp city.ibd city_new.ibd
    
    #授权
    [root@db04 world]# chown -R mysql.mysql city_new.ibd
    
    #导入表空间
    mysql> alter table city_new import tablespace;
    Query OK, 0 rows affected, 1 warning (0.02 sec)
    
    
    
    
    
    
    
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  • 原文地址:https://www.cnblogs.com/longren/p/11197396.html
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