sfwmd real time data

Because of their own graduation need to do a project on environmental monitoring, the principle is through the wireless acquisition of environmental information, the information in real-time storage to the database, the host computer is a WinForm program, the program needs to display the data collected in real-

650) This. width = 650; "src =" http://s3.51cto.com/wyfs02/M02/38/17/wKiom1OyhAuDcVADAABNuIyGy5A162.png "Title =" fenfa. PNG "alt =" wkiom1oyhaudcvadaabnuiygy5a162.png "/> I. rsync Compared with traditional CP and tar backup methods, rsync has the advantages of high security, fast backup, and support for Incremental backup. Rsync can meet the demand for data backup with low real-

Rsync + inotify Real-time Data Synchronization instance I. Why does the combination of rsync + inotify appear ?? Rsync defects: 1. When rsync implements a large amount of data backup, It scans the entire data file. In fact, only a small part of the changes are made, resultin

Unison + inotify implement real-time bidirectional data synchronization unisonIt is a file synchronization tool across windows, linux, and mac OS platforms. It not only supports local synchronization, but also supports synchronization through network protocols such as SSH, RSH, and Socket. Even better,unisonTwo-way synchronization is supported. You can synchroniz

Rsync + inotify for Real-time Data SynchronizationPreface:Rsync can implement triggered file synchronization, but it is triggered by the crontab daemon. the synchronized data is different from the actual data, while inotify can monitor various changes in the file system, whe

protected]192.168.21.127::home_ Www.osyunwei.com--password-file=/etc/passwd.txtRSYNC-AVH--port=873--progress--delete/home/www.osyunwei.com/[email protected]192.168.21.128::home_ Www.osyunwei.com--password-file=/etc/passwd.txtAfter the completion of the operation, respectively on the two target server 192.168.21.127,192.168.21.128 view, in the /home/www.osyunwei.com directory has Ceshi folder, indicating that the data synchronization success. Second,

I. Overview of Rsync1.1,rsyncthe advantages and disadvantagesRsync, compared with traditional CP and tar backup methods, has the advantages of high security, fast backup, support of incremental backup, and so on, rsync can solve the requirement of low-real-time data backup, such as regular backup file server data to re

protected]::tools/tmpPassword file only record password, remember to set permissions 600# echo "passowd_for_jingming" >/etc/rsync_client# chmod 600/etc/rsync_clientFrom the above two commands can be seen, actually here the concept of server and client is very vague, rsync Daemon are run on the remote 192.168.18.100, the first command is the local active push directory to remote, remote server is used to back up, the second command is to take the local initiative to remotely request files, local

resources. Each polling request typically creates a TCP socket connection (unless HTTP 1.1 sets its own keepAlive to true, the socket that was previously created) is used. The socket connection itself is very expensive. In addition, each request transmits some data on the network, and if the request does not find any updates on the server, such data transfer is a waste of resources. If other applications a

Today there is no continuation of the previous story, interspersed with a small episode, WebSocket real-time data communication synchronization problem, today we are not very pure WebSocket related knowledge, we use the WebGL 3D topology map to present an interesting Demo. Let's take a look at what this real-

This article is mainly in my beginning to learn the technical summary of SignalR , online looking for learning methods and examples are mostly just translated an example of the official, and did not give some other examples of classic cases, so this article summarizes, I in the implementation of push simple data, Think of how to push the complex data, as well as push a