每天定时在mysql server端(假设IP为：23.x.x.1)打包备份/var/lib/mysql，然后通过rsync备份至远端rsync备份服务器(假设IP为：23.y.y.2)上保存。
Mysql Server(IP: 23.x.x.1)----rsync---->Rsync Server(IP: 23.y.y.2)
Step 1).远程备份服务器, rsync服务端：
apt-get install rsync
vi /etc/default/rsync
RSYNC_ENABLE=true
:wq!
vi /etc/rsyncd.conf
[backup]
# destination directory for copy
path = /home/backup
# hosts you allow to access 若有多个IP以空格隔开
hosts allow = 23.x.x.1
hosts deny = *
list = true
uid = root
gid = root
read only = false
:wq!
mkdir /home/backup
/etc/init.d/rsync start
Step 2).MYSQL Server, rsync客户端：
apt-get install rsync
vi /etc/rsync_exclude.lst
/home/mysqlbak
:wq!
mkdir /home/mysqlbak
vi /usr/sbin/rsyncbaksql.sh
#!/bin/sh
filename=`date +%a`
tar -czPf /home/mysqlbak/sqlbak-$filename.tar.gz /var/lib/mysql/
rsync -avz --delete --exclude-from=/etc/rsync_exclude.lst /home/mysqlbak/ 23.y.y.2::backup
:wq!
chmod +x /usr/sbin/rsyncbaksql.sh
vi /etc/crontab
01 23 * * * root /usr/sbin/rsyncbaksql.sh > /dev/null 2>&1