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MySQL备份与恢复之percona-xtrabackup实现增量备份及恢复

Jun 07, 2016 pm 05:33 PM

首先,使用percona-xtrabackup工具对数据库进行全备,然后再每次数据库的数据更新后对数据进行增量备份,每次增量备份均在上一次

一 文章回顾

在上一篇文章,我们讲到percona-xtrabackup软件的使用,这一篇文章我们讲解percona-xtrabackup实现增量备份及恢复。 

二 增量备份示意图

 

 

三 percona-xtrabackup实现增量备份及恢复原理 

首先,使用percona-xtrabackup工具对数据库进行全备,然后再每次数据库的数据更新后对数据进行增量备份,每次增量备份均在上一次备份的基础上。恢复时依次把每次增量备份的数据恢复到全备中,最后使用合并的数据进行数据恢复。 

四 percona-xtrabackup实现增量备份及恢复

 

第一步,全备

[root@serv01 databackup]# innobackupex --user=root --password=123456 /databackup/

 

第二步,查看数据

mysql> use larrydb; Database changed mysql> select * from class; +------+-------+ | cid | cname | +------+-------+ | 1 | linux | | 2 | dab | | 3 | Devel | +------+-------+ 3 rows in set (0.00 sec) mysql> select * from stu; +------+----------+------+ | sid | sname | cid | +------+----------+------+ | 1 | larry007 | 1 | +------+----------+------+ 1 row in set (0.00 sec)

 

第三步,,更新数据

mysql> insert into stu values(2,'larry02',1); Query OK, 1 row affected (0.00 sec) mysql> select * from stu; +------+----------+------+ | sid | sname | cid | +------+----------+------+ | 1 | larry007 | 1 | | 2 | larry02 | 1 | +------+----------+------+ 2 rows in set (0.00 sec)

 

第四步,增量备份,进行了全备和第一次增量备份,所以有两个备份文件夹。我们每次增量备份都是针对上一次备份。

#--incremental:增量备份的文件夹 #--incremental-dir:针对哪个做增量备份 [root@serv01 databackup]# innobackupex --user=root --password=123456 --incremental /databackup/ --incremental-dir /databackup/2013-09-10_22-12-50/ InnoDB Backup Utility v1.5.1-xtrabackup; Copyright 2003, 2009 Innobase Oy and Percona Inc 2009-2012. All Rights Reserved. …… innobackupex: Backup created in directory '/databackup/2013-09-10_22-15-45' innobackupex: MySQL binlog position: filename 'mysql-bin.000004', position 353 130910 22:16:04 innobackupex: completed OK! [root@serv01 databackup]# ll total 8 drwxr-xr-x. 9 root root 4096 Sep 10 22:13 2013-09-10_22-12-50 drwxr-xr-x. 9 root root 4096 Sep 10 22:16 2013-09-10_22-15-45

 

第五步,再次插入数据

mysql> insert into stu values(3,'larry03',1); Query OK, 1 row affected (0.00 sec) mysql> select * from stu; +------+----------+------+ | sid | sname | cid | +------+----------+------+ | 1 | larry007 | 1 | | 2 | larry02 | 1 | | 3 | larry03 | 1 | +------+----------+------+ 3 rows in set (0.00 sec)

 

第六步,再次增量备份

[root@serv01 databackup]# ll total 8 drwxr-xr-x. 9 root root 4096 Sep 10 22:13 2013-09-10_22-12-50 drwxr-xr-x. 9 root root 4096 Sep 10 22:16 2013-09-10_22-15-45 [root@serv01 databackup]# innobackupex --user=root --password=123456 --incremental /databackup/ --incremental-dir /databackup/2013-09-10_22-15-45/

 

第七步,再次插入数据

mysql> insert into stu values(4,'larry04',1); Query OK, 1 row affected (0.00 sec) mysql> select * from stu; +------+----------+------+ | sid | sname | cid | +------+----------+------+ | 1 | larry007 | 1 | | 2 | larry02 | 1 | | 3 | larry03 | 1 | | 4 | larry04 | 1 | +------+----------+------+ 4 rows in set (0.00 sec)

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