Inotify+rsync实现实时数据同步

　　使用rsync可以实现数据同步，但是即使使用crontab定时任务最小执行间隔为1分钟，在数据实时性要求比较高场合需使用inotify+rsync实现实时同步

　　下载inotify

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1	wget https://github.s3.amazonaws.com/downloads/rvoicilas/inotify-tools/inotify-tools-3.14.tar.gz

　　安装

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tar -xf inotify-tools-3.14.tar.gz yum -y install gcc-c++ ./configure --prefix=/usr/local/inotify-tools-3.14 make && make install ln -s /usr/local/inotify-tools-3.14/ /usr/local/inotify

　　显示帮助

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1	/usr/local/inotify/bin/inotifywait --help

　　

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inotifywait 3.14 Wait for a particular event on a file or set of files. Usage: inotifywait [ options ] file1 [ file2 ] [ file3 ] [ ... ] Options:     -h|--help       Show this help text.     @<file>           Exclude the specified file from being watched.     --exclude <pattern>                     Exclude all events on files matching the                     extended regular expression <pattern>.     --excludei <pattern>                     Like --exclude but case insensitive.     -m|--monitor    Keep listening for events forever.  Without                     this option, inotifywait will exit after one                     event is received.     -d|--daemon     Same as --monitor, except run in the background                     logging events to a file specified by --outfile.                     Implies --syslog.     -r|--recursive  Watch directories recursively.     --fromfile <file>                     Read files to watch from <file> or `-' for stdin.     -o|--outfile <file>                     Print events to <file> rather than stdout.     -s|--syslog     Send errors to syslog rather than stderr.     -q|--quiet      Print less (only print events).     -qq             Print nothing (not even events).     --format <fmt>    Print using a specified printf-like format                     string; read the man page for more details.     --timefmt <fmt>   strftime-compatible format string for use with                     %T in --format string.     -c|--csv        Print events in CSV format.     -t|--timeout <seconds>                     When listening for a single event, time out after                     waiting for an event for <seconds> seconds.                     If <seconds> is 0, inotifywait will never time out.     -e|--event <event1> [ -e|--event <event2> ... ]         Listen for specific event(s).  If omitted, all events are         listened for.   Exit status:     0  -  An event you asked to watch for was received.     1  -  An event you did not ask to watch for was received           (usually delete_self or unmount), or some error occurred.     2  -  The --timeout option was given and no events occurred           in the specified interval of time.   Events:     access      file or directory contents were read     modify      file or directory contents were written     attrib      file or directory attributes changed     close_write file or directory closed, after being opened in                 writeable mode     close_nowrite   file or directory closed, after being opened in                 read-only mode     close       file or directory closed, regardless of read/write mode     open        file or directory opened     moved_to    file or directory moved to watched directory     moved_from  file or directory moved from watched directory     move        file or directory moved to or from watched directory     create      file or directory created within watched directory     delete      file or directory deleted within watched directory     delete_self file or directory was deleted     unmount     file system containing file or directory unmounted

　　监控一个文件夹，开启另外一个窗口创建修改删除文件

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

　　创建删除打开修改或者重定向都会有输出

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1 2	touch test vim test

　　显示如下

　　写一个脚本配合rsync实现数据同步

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#!/bin/bash inotify=/usr/local/inotify/bin/inotifywait $inotify -mrq --format '%w%f' -e create,close_write,delete,motify /data \ |while read file do  cd / &&  rsync -az ./data --delete rsync_backup@192.168.1.4::backup/ \  --password-file=/etc/rsync.password done

　　rsync安装配置参考文档 https://www.cnblogs.com/minseo/p/8080426.html

 　　把该脚本设置在后台及开机启动运行即可实现实时的数据同步