As a resource organization and expression mechanism, the Web has become the most important information transmission medium on the Internet. Therefore, the performance of the Web has become an important evaluation criterion for judging the success of a website. The web server is an important link in determining web performance.
Web server performance refers to a Web server's ability to respond to user requests. In order to improve the performance of Web servers, many attempts have been made and gratifying results have been achieved. Through the analysis of previous research results, this paper proposes methods and strategies for optimizing Web servers in specific application environments.
Web server overview
Web systems are widely used in today's networks, and Web servers are an important part of Web systems. The complete Web structure should include: HTTP protocol, Web server, common gateway interface CGI, Web application programming interface, and Web browser.
A web server refers to a program that resides on a certain type of computer on the Internet. It is a server that builds a basic platform for information publishing, data query, data processing and many other applications based on HTTP as the information provider in the network. Its main function is to provide online information browsing services. When a web browser (client) connects to the server and requests a file, the server processes the request and sends the file to the browser, along with information that tells the browser how to view the file (ie, the file type).
The web server's web page processing can be roughly divided into three steps: the first step, the web browser sends a web page request to a specific server; the second step, after the web server receives the web page request, it searches for the requested web page. page and transmit the requested web page to the web browser; in the third step, the web server receives the requested web page and displays it.
Web servers are capable of not only storing information but also running scripts and programs based on information provided by users through their web browsers. On the Web, most common form-based search engines use CGI scripts.
Factors affecting web application server performance
The performance of a Web server refers to the ability of a Web server to respond to user requests. The performance of the server is crucial to a Web system. In order to improve the performance of Web servers, people have made many attempts and adopted many technologies and methods, but these technologies and methods often lack applicability.
Through previous research and analysis, it can be found that there are two main reasons for this problem in web server optimization: on the one hand, it is caused by server performance evaluation, and on the other hand, it is caused by incomplete considerations when selecting optimization solutions.
When current server performance evaluation tools evaluate Web servers, they actually use one or several computers to simulate clients and communicate with the Web server under test. In fact, they only form a local area network environment, which is different from the real environment. There are certain differences in the WAN environment.
In addition, although the evaluation tool has been as close as possible to the real load when selecting the network load, there is still a gap between the continuous high-frequency load requirements; furthermore, the selection and analysis of performance test indicators are not reasonable enough, resulting in analysis problems. The results are not fair and reliable enough. When choosing methods to optimize Web servers, they often only consider the aspect of the Web server and rarely combine it with the specific application environment. Therefore, the evaluation results are not scientific enough, the application environment is not considered comprehensively, and the web server performance optimization lacks pertinence. Therefore, optimizing the performance of the Web server in a specific application environment requires additional consideration of the following two main factors: network characteristics and Web load characteristics.
Network characteristics refer to the network conditions where the web server is located, whether it is a wide area network or a local area network, whether it is a high-speed network (a network with a transmission rate above 1OOMb/s is called a high-speed network) or a low-speed network, and the related types of data transmitted in different networks, and the network Network characteristics such as response time, throughput, and utilization are not the same, so they must be distinguished and analyzed in detail.
In terms of Web load characteristics, when evaluating a Web server, a very critical factor is the selection of Web load. Although there are many kinds of evaluation tools, they all do enough homework in selecting the load. The main purpose of research on Web load characteristics is to evaluate Web server performance. Based on these characteristics, you can choose evaluation tools that simulate the most realistic Web load in order to obtain Web server performance evaluation data that is closest to the facts, so as to better evaluate the performance of Web servers. It conducts analysis and derives optimization solutions.