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xtrabackup是一个对innodb做数据备份的工具，支持在线热备份。
1.安装percona仓库
yum -y install http://www.percona.com/downloads/percona-release/redhat/0.1-4/percona-release-0.1-4.noarch.rpm
2.安装xtrabackup
yum install percona-xtrabackup -y
3.创建备份用户及设置权限
create user ‘bkpuser’@'localhost' identified by 'password';
grant reload,lock tables,process,replication client on *.* to 'bkpuser'@'localhost';
flush privileges;
4.配置xtrabackup
vim /root/.my.cnf
[xtrabackup]
user=bkpuser
password=password
5.执行一次全备份
xtrabackup --backup --target-dir=/data/backups/mysql/full_backup
6.在全备份的基准上执行第一次增量备份
xtrabackup --backup --target-dir=/data/backups/mysql_increase1 --incremental-basedir=/data/backups/mysql/full_backup
7.往后的每一次增量备份都以上一次增量备份为基准
xtarbackup --backup --target-dir=/data/backups/mysql_increase2 --incremental-basedir=/data/backups/mysql_increase2
8.自动备份写脚本
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