rsync+inotify实时同步:

注：

rsync的不足：

1、rsync同步数据时，需要扫描所有文件后进行对比，进行差量传输。如果文件数量达到百万甚至千万量级，扫描所有文件是非常耗时的。
2、rsync不能实时的去检测、同步数据。

inotify可以做到对目录的实时监控，然后告知rsync只对更新部分进行同步

apt-get install inotify-tools

inotifywait -mrq /home/ming -e create,delete,moved_to,close_write

写个实时同步的脚本：

注：

1、该脚本只能在主操作的一端运行
2、inotifywait 排除目录是--fromfile，写绝对路径
3、rsync排除目录是--exclude，写相对路径

vi /usr/local/bin/inotify/inotify.sh

#!/bin/bash

des=/home/ming/
host=10.0.0.2
user=ming
log=/usr/local/bin/inotify/logs/inotify.log

/usr/bin/inotifywait -mrq -e create,delete,attrib,moved_to,close_write --fromfile '/usr/local/bin/inotify/inotify_file' --timefmt '%Y-%m-%d %H:%M' --format '%T %w%f %e' | while read date time file event
do
echo $date $time $file $event >> $log
if [ $event = 'CLOSE_WRITE,CLOSE' ];then
/usr/bin/rsync -avzcR --progress --exclude-from=/usr/local/bin/inotify/rsync_file $(dirname $file) $user@$host:$des
fi
if [ $event = 'DELETE' ] || [ $event = 'MOVED_FROM' ];then
/usr/bin/rsync -avzR --progress --delete --exclude-from=/usr/local/bin/inotify/rsync_file $(dirname $file) $user@$host:$des
fi
if [ $event = 'ATTRIB' ];then
echo 'ATTRIB'
if [ ! -d $file ];then
/usr/bin/rsync -avzcR --progress --exclude-from=/usr/local/bin/inotify/rsync_file $(dirname $file) $user@$host:$des
fi
fi

done

:wq

vi /usr/local/bin/inotify/inotify_file

/home/ming （监控/home/ming目录）
@/home/ming/bb （排除/home/ming/bb目录）
:wq

vi /usr/local/bin/inotify/rsync_file

/home/ming/bb
/home/ming/aa
:wq

chmod +x /usr/local/bin/inotify/inotify.sh

sh /usr/local/bin/inotify/inotify.sh >> /usr/loca/bin/inotify/logs/rsync.log &

设置开机自启动：

vi /etc/rc.local (在exit 0前添加)

/bin/sh /usr/local/bin/inotify/inotify.sh >> /usr/local/bin/inotify/logs/rsync.log &

:wq