Programmer Group

psutil introduction psutil is a cross platform library( http://code.google.com/p/psutil/ )It can easily obtain the process and system utilization (including CPU, memory, disk, network, etc.) information of the system. It is mainly used in system monitoring, analysis and limitation of system resources and process management. It implements the ...

Front end performance indicators, mostly including TTFB, first screen, first interactive time, etc There are a lot of related articles, so we won't talk about the details here. Please refer to the end of the article   In general, we need to know that the browser (New) provides us with the Performance API. With this property, we can get a ser ...

Crawls to take the Douban top 250 movie score, the poster, the movie review and so on data!   this project is the most basic and simple example among reptiles; Later, there will be more advanced and automated crawlers using the crawler framework.   the process of this project is to use requests request library to get html, and then us ...

Network group is a new technology on centos7. Its function is similar to binding. It is a method of aggregating multiple network cards to achieve redundancy and improve throughput. Different from the binding technology in the old version, network group provides better performance and scalability. It is implemented by kernel drive and team D d ...

8.1.5 Compressed network data The server in the next code list responds to a file name request with a stream compressor that writes a compressed version of the file to a socket that communicates with the client. import zlib import logging import socketserver import binascii BLOCK_SIZE = 64 class ZlibRequestHandler(socketserver ...

I. three cores of using Java NIO to complete network communication 1. Channel: responsible for connection java.nio.channels.Channel interface:              |--SelectableChannel                  |--SocketChannel                  |--ServerSocketChannel                  |--DatagramChannel                    |--Pipe.SinkChannel                  |-- ...

brief introduction Use Kube router to realize the function of inress of k8s cluster, which is highly available and easy to expand Environmental description This experiment is based on the k8s cluster which has been installed and configured. For k8s installation, please refer to other blog articles. lab4, as a router, forwards lab5's request Exp ...

When dealing with the network, we often encounter the situation that the network requests depend on each other. For example, the parameter of B request depends on the callback result of A request. If B is requested directly in the callback of A request, it will lead to the nesting of callbacks, which leads to the tight coupling bet ...

Please refer to my brief book: Simulate HTTP request to call controller Written in front MockMvc realizes the simulation of Http request, and can directly use the form of network to convert to Controller call, which makes the test faster and does not depend on the network environment. It also provides a set of verification tools. The single tes ...

I. Preface The alarm linkage function is not a conventional function, but a customized function for customers. For example, when the data collected by the detector is alarmed, it is not only necessary to play the alarm sound locally, store the alarm record, send the alarm message and e-mail, but also to trigger the alarm panel light to alarm. T ...