MySQL备份与恢复之真实环境使用冷备(二)
01 ~]# /etc/init.d/mysqld stop
ERROR! MySQL server PID file could not be found!
[root@serv01 ~]# ps -ef | grep mysqld
root 1055 1 0 18:05 00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/usr/local/mysql/data --pid-file=/usr/local/mysql/data/serv01.host.com.pid
mysql 1332 1055 0 18:05 00:00:00 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/usr/local/mysql/data/serv01.host.com.err --pid-file=/usr/local/mysql/data/serv01.host.com.pid --socket=/tmp/mysql.sock --port=3306
root 1885 1490 0 18:18 pts/0 00:00:00 grep mysqld
[root@serv01 ~]# pkill -9 mysql
[root@serv01 ~]# ps -ef | grep mysqld
root 1888 1490 0 18:18 pts/0 00:00:00 grep mysqld
[root@serv01 ~]# chown mysql.mysql /usr/local/mysql/data/ -R
[root@serv01 opt]# ll /usr/local/mysql/data/
total 0
[root@serv01 opt]# ll /usr/local/mysql/data/ -d
drwxr-xr-x. 2 mysql mysql 4096 Sep 10 18:17 /usr/local/mysql/data/
第十三步，恢复数据
[root@serv01 opt]# tar -xPvf mysql01.tar.gz
第十四步，启动数据库，登录MySQL，然后查看数据是否丢失
[root@serv01 opt]# /etc/init.d/mysqld start
Starting MySQL SUCCESS!
[root@serv01 ~]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.5.29-log Source distribution
Copyright (c) 2000, 2012, 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.
mysql> use larrydb;
Database changed
mysql> show tables;
+-------------------+
| Tables_in_larrydb |
+-------------------+
| class |
| stu |
+-------------------+
2 rows in set (0.00 sec)
mysql> select * from class;
+------+--------+
| cid | cname |
+------+--------+
| 1 | linux |
| 2 | oracle |
+------+--------+
2 rows in set (0.01 sec)
mysql> select * from stu;
+------+---------+------+
| sid | sname | cid |
+------+---------+------+
| 1 | larry01 | 1 |
| 2 | larry02 | 2 |
+------+---------+------+
2 rows in set (0.00 sec)
第十五步，使用LVS的快照功能创建快照，快照不需要格式化。
[root@serv01 opt]# l
vcreate -L 100M -s -n smydata /dev/data/mydata
Logical volume "smydata" created
第十六步，挂载
[root@serv01 opt]# mount /dev/data/smydata /mnt
[root@serv01 opt]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 9.7G 2.4G 6.8G 27% /
tmpfs 188M 0 188M 0% /dev/shm
/dev/sda1 194M 25M 160M 14% /boot
/dev/sda5 4.0G 161M 3.7G 5% /opt
/dev/sr0 3.4G 3.4G 0 100% /iso
/dev/mapper/data-mydata
2.0G 98M 1.8G 6% /usr/local/
mysql/data
/dev/mapper/data-smydata
2.0G 98M 1.8G 6% /mnt
第十七步，模拟数据丢失和验证快照的数据不会受本身数据的影响
[root@serv01 opt]# cd /mnt
[root@serv01 mnt]# ls
crm ib_logfile1 mysql-bin.000003 mysql-bin.000008 mysql-bin.000013 mysql-bin.index
game larrydb mysql-bin.000004 mysql-bin.000009 mysql-bin.000014 performance_schema
hello mysql