MySQL基於時間點恢復和快照恢復實例

**時間點恢復例子**

mysqldump -uroot  -p mydb > /root/mydb-`date +"%F"`.sql

//添加數據

use mydb;

CREATE TABLE t1(name CHAR(20));

INSERT INTO t1 VALUES ('Tom'),('Jerry');

DESC stu;

INSERT INTO stu(name,age) VALUES ('Flyn',18);

SELECT * FROM stu;

//刪除數據庫

service mysqld stop

cd /data/

mv mydb /tmp

cp mysql-bin.000009 /root

service mysqld start

//查看數據庫,發現數據庫丟失

SHOW DATABASES;

SHOW BINLOG EVENTS IN 'mysql-bin.000009'\G;

mysqlbinlog /data/mysql-bin.000009

//創建數據庫

CREATE DATABASE mydb;

//數據庫恢復

mysqlbinlog  --start-position 106 --stop-position 504  /data/mysql-bin.000009 > /tmp/mydbrestore.sql

mysql -uroot -p  < /tmp/mydbrestore.sql

  **快照物理備份(時間點備份)**

fdisk /dev/sda

partprobe /dev/sda

pvcreate /dev/sda{5,6}

vgcreate vg0 /dev/sda{5,6}

lvcreate -L 2G -n mydata vg0

mke2fs -j /dev/vg0/mydata

mkdir /mydata

mount /dev/vg0/mydata /mydata

cp -rp /data/* /mydata

cd /mydata

chown mysql.mysql /mydata    //重要

sevice mysqld stop

vim /etc/my.cnf

datadir = /mydata 

service mysqld start

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FLUSH TABLES WITH READ LOCK;

FLUSH LOGS;

lvcreate -L 20M -s -n mysnap /dev/vg0/mydata

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UNLOCK TABLES;

mkdir /mysnap

mount /dev/vg0/mysnap /mysnap

cd /mysnap

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use mydb;

SELECT * FROM t1;

INSERT INTO t1 VALUES ('Wendy'),('Sandy'),('Sunny')

cp -rp /mysnap/mydb /tmp/mydb

umount /mysnap

lvremove /dev/vg0/mysnap

//演示數據丟失

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FLUSH LOGS;

DROP DATABASE mydb;

cd /mydata

service mysqld stop

cp -rp /tmp/mydb mydb

service mysqld start

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SHOW DATABASES;

use mydb;

SELECT * FROM t1;

SHOW BINLOG EVENTS IN 'mysql-bin.000013';

//數據恢復

mysqlbinlog --start-position 106 --stop-position 220 mysql-bin.000013 > /tmp/a.sql

mysql -uroot -p < /tmp/a.sql

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USE mydb;

SELECT * FROM t1;