Programmer Group

Gearman was used by LiveJournal to make picture resize. You also know that picture resize is a high CPU operation. If you let the web site do this high CPU function, it may bring you down. In web applications, let's look at how gearman solves this problem. Its architecture is similar to the following: From the picture above, you should see ...

Supervisor (http://supervisord.org ) is a process management tool written in Python that can be easily used to start, restart, and close processes (not just Python processes).In addition to controlling a single process, multiple processes can be started and shut down at the same time, such as when unfortunately the server is down and all applic ...

Systemctl is a system D tool, which is mainly responsible for controlling the system D system and service manager. Systemd is a collection of system management daemons, tools, and libraries that replace the initial process of System V. Systemd's function is to centrally manage and configure UNIX-like systems. In the Linux ecosystem, ...

In the working mode of multi-client accessing the server at the same time, the first thing is to ensure the normal operation of the server. Therefore, it is very important for Server to ensure that the connection is disconnected in time after establishing communication with Client. Otherwise, it is a terrible waste of server resources that mult ...

To understand the select.select module is essentially to understand its parameters and its three return values.The select() method receives and monitors three communication lists. The first is all input data, that is, data sent from outside, the second is monitoring and receiving all outgoing data, and the third is monitoring error information. ...

First: experimental environment Operating System: CentOS release 6.5 (Final) mysql dual master replication + keepalive achieves high availability: master1:10.192.203.201 master2:10.192.203.202 vip 10.192.203.203 Virtual ip is currently on master 1. The program writes vip.   2. Experimental steps 2.1 Upgrade Mas ...

theme outline Asp.net Application Domain, HttpRunTime edit time Newly build 20170925 Serial number Reference material 1 Asp.net Essence Theory 2 C# Advanced Programming (7th Edition) 3 http://blog.csdn.net/sh524555685/article/details/7454244 (Application Domain Interpretation) 4 http://blog.cs ...

ServerSocketChannelServer Socket Channel role? What do you do full-time?        1. Monitor the new TCP link channel.        2. Create a new Socket ChannelServer Socket Channel does not have any capabilities    Server Socket Channel does not have ...

Today let's talk about App Communications! 1. The traditional communication between App and server is well known. It's just that the third-party framework uses Apple's native request mode alive, socket, and all kinds of strange interactions. (vii) At present, the most famous one is AFNetworking. There are many articles on the internet, so I won ...

Why use the select model? Answer: Solve the blocking problem of accept(), recv(), send() in the basic C/S model Differences between select model and C/S model accept() in the C/S model blocks socket s that have been silly to link to The select model only solves the problem of accept() being silly, not the problem of recv(),send() execution blo ...