http://www.percona.com/blog/2006/08/21/using-lvm-for-mysql-backup-and-replication-setup/
http://blog.csdn.net/dengyue701/article/details/7190691
http://www.lenzg.net/mylvmbackup/#Docs
http://www.percona.com/blog/2013/07/09/lvm-read-performance-during-snapshots/
http://dev.mysql.com/doc/refman/5.6/en/tablespace-copying.html