inotify+rsync实现数据的实时同步备份

设备型号	功能	IP
Cents 6.4 x86-64	备份服务器	192.168.95.200
Cents 6.4 x86-64	NFS服务器（需要备份数据）	192.168.95.128

rsync安装使用请查看：http://www.ywlinux.com/archives/404

在NFS服务器上操作：

#统一创建存放个人源码工具的目录

mkdir -p /home/dongbo/tools

cd /home/dongbo/tools

#下载inotify3.14源码包

wget –no-check-certificate https://github.com/downloads/rvoicilas/inotify-tools/inotify-tools-3.14.tar.gz

ls -l inotify-tools-3.14.tar.gz 

#解压inotify源码包

tar -zxvf inotify-tools-3.14.tar.gz 

cd inotify-tools-3.14

#编译安装inotify

./configure –prefix=/usr/local/inotify-3.14

echo $?

make && make install

echo $?

cd ..

ln -sv /usr/local/inotify-3.14/ /usr/local/inotify

ls -l /usr/local/inotify

 

 

Events: 事件
  access        file or directory contents were read 文件或目录被(访问)读取r
  modify        file or directory contents were written 文件或目录被写入w
  attrib        file or directory attributes changed 文件或目录属性变更【理由：chmod更改属性】
  close_write   file or directory closed, after being opened in writeable mode 文件或目录被写关闭【理由：文件内容被更改】
  close_nowrite file or directory closed, after being opened in read-only mode 文件或目录以只读方式打开后关闭 
  close         file or directory closed, regardless of read/write mode 文件或目录被用编辑器(不管是读或写)关闭
  open          file or directory opened 文件或目录被用编辑器打开
  moved_to      file or directory moved to watched directory 文件或目录被移动进来【理由：mv目录内重命名】
  moved_from    file or directory moved from watched directory 文件或目录被移动出去
  move          file or directory moved to or from watched directory 文件或目录不管是移出或移进
  create        file or directory created within watched directory 文件或目录被创建【理由：mkdir创建目录】
  delete        file or directory deleted within watched directory 文件或目录被删除【理由：rm删除】
  delete_self   file or directory was deleted 文件或目录自删除
  unmount       file system containing file or directory unmounted 文件系统取消挂载

 

 

 

#测试监听创建文件目录

/usr/local/inotify/bin/inotifywait  -mrq --timefmt '%d/%m/%y %H:%M' --format '%T %w%f' -e create /data


#10/05/16 11:31 /data/xxx.txt



#测试监听删除文件目录

/usr/local/inotify/bin/inotifywait -mrq --timefmt '%d/%m/%y %H:%M' --format '%T %w%f' -e delete /data

#10/05/16 11:33 /data/a.txt

#测试监听创建，删除，修改文件目录

/usr/local/inotify/bin/inotifywait -mrq --timefmt '%d/%m/%f %H:%M' --format '%T %w%f' -e create,close_write,delete /data



#创建inotify脚本

mkdir /server/scripts

cd /server/scripts/

pwd

cat >/server/scripts/inotifywait.sh << EOF

#!/bin/sh

inotify=/usr/local/inotify/bin/inotifywait

$inotify -mrq --format '%w%f' -e create,close_write,delete /data \

|while read file

do 

   cd /  &&

   rsync -az ./data --delete rsync_backup@192.168.95.200::backup/ \

   --password-file=/etc/rsync.password

done

EOF

 

 

#安装rsync客户端

yum install rsync -y

echo “dongbos” >>/etc/rsync.password

cat /etc/rsync.password

chmod  600 /etc/rsync.password 

 

#加-x查看脚本执行过程

sh -x inotifywait.sh 

 

#将inotify放入后台运行并加入rc.local开机启动  

/bin/sh /server/scripts/intifywait.sh &

echo “/bin/sh /server/scripts/intifywait.sh &” >>/etc/rc.local

#文件为10-300K，传输并非在200-300个无延时，大于了会有延时

 

#优化：

[root@NFS-server scripts]# cd /proc/sys/fs/inotify/

[root@NFS-server inotify]# ls -l

total 0

-rw-r–r– 1 root root 0 May 10 12:26 max_queued_events

-rw-r–r– 1 root root 0 May 10 12:26 max_user_instances

-rw-r–r– 1 root root 0 May 10 12:26 max_user_watches

[root@NFS-server inotify]# 

默认值：

[root@NFS-server inotify]# cat max_queued_events 

16384

[root@NFS-server inotify]# cat max_user_instances 

128

[root@NFS-server inotify]# cat max_user_watches 

8192

[root@NFS-server inotify]# 

调整：并发大可以调整大点；

 

rsync安装使用请查看：http://www.ywlinux.com/archives/404