inotify

Best way to monitor file system changes in linux

放肆的年华 提交于 2019-11-27 01:06:47
问题 I'm looking at building a file system sync utility that monitors file system activity, but it appears that some of the file system monitoring features in the linux kernel are obsolete or not fully featured. What my research as found dnotify came first with notification has the features of notifying for delete,modify,access,attribs,create,move can determine file descriptor, however is now out dated by inotify and fanotify inotify came out second with notification has the features of notifying

How to check in python that a file in a folder has changed?

大憨熊 提交于 2019-11-26 20:57:37
问题 I need to know in python whenever a new file was added/removed/modified in a particular directory Is there a way for that? I'm looking for an "inofity"-like function (from POSIX). Thanks 回答1: Use inotify-tools (In the original version, I mentioned pyinotify, but it had issues, and now is deprecated and not recommended). 回答2: You can use inotify for python, which is NOT the same as PyInotify (older). 回答3: As mentioned in the similar question, you might want to have a look at http://packages

inotify with NFS

♀尐吖头ヾ 提交于 2019-11-26 19:48:43
I've recently created a dropbox system using inotify, watching for files created in a particular directory. The directory I'm watching is mounted from an NFS server, and inotify is behaving differently than I'd expect. Consider the following scenario in which an inotify script is run on machine A, watching /some/nfs/dir/also/visible/to/B. -Using machine A to create a file in /some/nfs/dir/also/visible/to/B, the script behaves as expected. Using machine B to carry out the same action, the script is not notified about a new file dropped in the directory. -When the script is run on the NFS server

How to monitor a complete directory tree for changes in Linux?

≯℡__Kan透↙ 提交于 2019-11-26 19:16:53
问题 How can I monitor a whole directory tree for changes in Linux ( ext3 file system)? Currently the directory contains about half a million files in about 3,000 subdirectories , organized in three directory levels. Those are mostly small files (< 1kb, some few up to 100 kb). It's a sort of queue and I need to know when files are being created, deleted or their content modified within 5-10 seconds of that happening. I know there is inotify and sorts, but AFAIK they only monitor a single directory

linux安装 rsync 客户端和相关权限认证

自作多情 提交于 2019-11-26 16:48:07
[root@rsync-client-inotify /]# yum install rsync -y [root@rsync-client-inotify /]# echo "redhat">/etc/rsync.password [root@rsync-client-inotify /]# chmod 600 /etc/rsync.password [root@rsync-client-inotify /]# cat /etc/rsync.password Redhat [root@rsync-client-inotify /]# ll /etc/rsync.password -rw-------. 1 root root 20 Jun 4 04:27 /etc/rsync.password 来源: https://www.cnblogs.com/fanweisheng/p/11327153.html

How to run a shell script when a file or directory changes?

南楼画角 提交于 2019-11-26 14:19:55
I want to run a shell script when a specific file or directory changes. How can I easily do that? Use inotify-tools . Dominykas Mostauskis I use this script to run a build script on changes in a directory tree: #!/bin/bash -eu DIRECTORY_TO_OBSERVE="js" # might want to change this function block_for_change { inotifywait --recursive \ --event modify,move,create,delete \ $DIRECTORY_TO_OBSERVE } BUILD_SCRIPT=build.sh # might want to change this too function build { bash $BUILD_SCRIPT } build while block_for_change; do build done Uses inotify-tools . Check inotifywait man page for how to customize

rsync+inotify实现文件实时同步

江枫思渺然 提交于 2019-11-26 12:30:35
一、相关组件简介 1、rsync 与传统的cp、tar备份方式相比,rsync具有安全性高、备份迅速、支持增量备份等优点,通过rsync可以解决对实时性要求不高的数据备份需求,例如定期的备份文件服务器数据到远端服务器,对本地磁盘定期做数据镜像等。 随着应用系统规模的不断扩大,对数据的安全性和可靠性也提出的更好的要求,rsync在高端业务系统中也逐渐暴露出了很多不足,首先,rsync同步数据 时,需要扫描所有文件后进行比对,进行差量传输。如果文件数量达到了百万甚至千万量级,扫描所有文件将是非常耗时的。而且正在发生变化的往往是其中很少的 一部分,这是非常低效的方式。其次,rsync不能实时的去监测、同步数据,虽然它可以通过linux守护进程的方式进行触发同步,但是两次触发动作一定 会有时间差,这样就导致了服务端和客户端数据可能出现不一致,无法在应用故障时完全的恢复数据。基于以上原因,rsync+inotify组合出现了! 2、inotify Inotify 是一种强大的、细粒度的、异步的文件系统事件监控机制,linux内核从2.6.13起,加入了Inotify支持,通过Inotify可以监控文件系统 中添加、删除,修改、移动等各种细微事件,利用这个内核接口,第三方软件就可以监控文件系统下文件的各种变化情况,而inotify-tools就是这样 的一个第三方软件。 在上面章节中,我们讲到

What is the proper way to use inotify?

[亡魂溺海] 提交于 2019-11-26 11:01:48
问题 I want to use the inotify mechanism on Linux. I want my application to know when a file aaa was changed. Can you please provide me with a sample how to do that? 回答1: Documentation ( from Monitor file system activity with inotify ) The inotify C API inotify provides three system calls to build file system monitors of all kinds: inotify_init() creates an instance of the inotify subsystem in the kernel and returns a file descriptor on success and -1 on failure. Like other system calls, if

linux sersync实时同步软件

旧城冷巷雨未停 提交于 2019-11-26 10:21:44
Sersync实时同步软件 一、Sersync项目简介与框架设计 1.1项目简介 Sersync项目利用inotify与rsync技术实现对服务器数据实时同步的解决方案,其中inotify用于监控sersync所在服务器上文件系统的事件变化,rsync是目前广泛使用的本地及异地数据同步工具,其优点是只对变化的目录数据操作,甚至是一个文件不同的的部分进行同步,所以其优势大大超过使用挂接文件系统或scp等方式进行镜像同步. 目前使用的比较多的同步程序版本是inotify-tools,另外一个是google开源项目Openduckbill(依赖于inotify-tools),这两个都是基于脚本语言编写的,其设计思路同样是采用inotify与rsync命令. 相比上面两个项目,sersync项目的优点是: 1.使用c++编写,对linux系统文件产生的临时文件和重复的文件操作会进行过滤(后面会提到),在结合rsync同步的时候,会减少运行时消耗的本地及网络资源.因此速度更快. 2.相比较上面两个项目,sersync配置起来很简单:在 http://code.google.com/p/sersync/downloads/list 处下载源码(分为32版本与64位版本),其中bin目录下是已经编译好的二进制文件,配合bin目录下的xml文件直接使用即可. 3.使用多线程进行同步

rsync nfs web01总结

雨燕双飞 提交于 2019-11-26 10:19:24
目录 rsync nfs web01总结 要求 部署rsync服务端(172.16.1.41) 部署rsync客户端(172.16.1.31、172.16.1.7) 部署web代码 NFS服务端部署 部署nfs备胎服务端 部署nfs的客户端web01 在nfs下:backup实时同步nfs的data目录: backup服务端需求 在客户端web01下面执行,切换备胎backup, sersync项目实战,达到实时同步的要求 环境准备 安装rsync的服务端(backup) NFS服务端部署sersync 单独实现实时同步 rsync nfs web01总结 要求 1.部署rsync服务端,部署rsync客户端(web01,nfs) 配合脚本,每天凌晨1点做备份 2.部署上传作业的代码(尝试) 3.部署nfs服务端(nfs,backup)部署nfs客户端(web01) 4.部署sersync,给nfs的共享存储目录,实时同步到backup服务器(解决单点故障) 所有的服务,都需要经过: 1.下载 2.安装 3.配置 4.启动 部署rsync服务端(172.16.1.41) 1)安装rsync [root@backup ~]# yum install -y rsync 2)配置rsync [root@backup ~]# vim /etc/rsyncd.conf uid = www