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)更多详情见请继续阅读下一页的精彩内容:

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