方法1、安装xtrabackup工具， 直接安装缺少依赖包
https://www.percona.com/downloads/XtraBackup/
[root@localhost src]# wget -c https://www.percona.com/downloads/XtraBackup/Percona-

XtraBackup-2.4.4/binary/redhat/6/x86_64/percona-xtrabackup-24-2.4.4-1.el6.x86_64.rpm

[root@localhost src]# rpm -ivh percona-xtrabackup-24-2.4.4-1.el6.x86_64.rpm
warning: percona-xtrabackup-24-2.4.4-1.el6.x86_64.rpm: Header V4 DSA/SHA1 Signature, key ID

cd2efd2a: NOKEY
error: Failed dependencies:
        libev.so.4()(64bit) is needed by percona-xtrabackup-24-2.4.4-1.el6.x86_64
        perl(DBD::mysql) is needed by percona-xtrabackup-24-2.4.4-1.el6.x86_64

 libev 在yum的扩展库中，
 yum -y install perl perl-devel libaio libaio-devel

 因为使用perl的编写脚本，应先安装
  yum -y install perl-Time-HiRes
 yum -y install perl-DBD-MySQL



方法2.先安装 Percona的yum库:

yum install https://www.percona.com/redir/downloads/percona-release/redhat/0.1-3/percona-release-0.1-3.noarch.rpm

yum list | grep percona

yum install percona-xtrabackup-24
error: Failed dependencies:
        libev.so.4()(64bit) is needed by percona-xtrabackup-24-2.4.4-1.el6.x86_64

wget -c ftp://rpmfind.net/linux/dag/redhat/el6/en/x86_64/dag/RPMS/libev-4.15-1.el6.rf.x86_64.rpm

rpm -ivh libev-4.15-1.el6.rf.x86_64.rpm

yum install percona-xtrabackup-24   

grant reload, process, lock tables,replication client on *.* to 'backup'@'localhost' identified by 'backup' ; 

flush privileges;

备份目录：


安装完成！


4.参考
http://www.cnblogs.com/olinux/p/5207887.html
http://www.cnblogs.com/jiangwenju/p/4919482.html