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This article mainly introduces the differences between Tomcat and other WEB containers in JavaWeb. It is very detailed and has a certain reference value. Friends who are interested must read it!

Mainly introduces the definition, differences, advantages and disadvantages of tomcat and nginx,apache.

The difference between Tomcat and physical server Tomcat:

Essence: software Web application server-a free and open source Web application server, which is a lightweight application server, is widely used in small and medium-sized systems and not many concurrent access users, and is the first choice for developing and debugging JSP programs.

Purpose:

A. When an Apache server is configured on a machine (that is, a physical server, that is, a physical machine), it can be used to respond to requests for access to HTML pages. Tomcat is actually an extension of the Apache server, but at run time it runs independently, so when you run tomcat, it actually runs as a separate process from Apache, and Tomcat actually runs JSP pages and Servlet

B. Tomcat, like Web servers such as IIS, has the function of dealing with HTML pages. It is also a Servlet and JSP container, and a separate Servlet container is the default mode of Tomcat.

Physical server:

1. Essence: hardware, that is, servers or physical machines that we often talk about, our PC is a network server with low performance, such as cloud servers (such as Aliyun ECS).

2. Composition: processor, hard disk, memory, system bus, etc., similar to the general computer architecture, but due to the need to provide high and reliable services, therefore, it requires high processing capacity, stability, reliability, security, scalability, manageability and so on.

Explain in detail the differences between tomcat and nginx,apache and the definition of their advantages and disadvantages:

1. Apache

Apache HTTP server is a modular server that can run on almost all widely used computer platforms. It belongs to the application server. Apache supports many modules with stable performance. Apache itself is static parsing, suitable for static HTML, pictures, etc., but it can support dynamic pages by extending scripts, modules, and so on.

(Apche can support PHPcgiperl, but to use Java, you need Tomcat in the Apache background to forward the Java request from Apache to Tomcat for processing.) Disadvantages: the configuration is relatively complex and does not support dynamic pages.

2. Tomcat:

Tomcat is an application (Java) server, it is just a Servlet (JSP is also translated into Servlet) container, can be thought of as an extension of Apache, but can be run independently of Apache.

3. Nginx

Nginx is a very lightweight HTTP server written by Russians, Nginx, pronounced "engine X", is a high-performance HTTP and reverse proxy server, but also an IMAP/POP3/SMTP proxy server.

Difference

1. Comparison between Apache and Tomcat

Similarities:

Both are developed by the Apache organization and both have the functionality of HTTP services. Both are free of charge.

Apache is specially used to provide HTTP services and related configurations (such as virtual hosts, URL forwarding, etc.), while Tomcat is a JSP server developed by Apache organizations in accordance with Java EE's JSP and Servlet standards.

Apache is a Web server environment program that enables it to be used as a Web server, but only supports static pages such as (ASP,PHP,CGI,JSP) and other dynamic pages. If you want to run JSP in an Apache environment, you need an interpreter to execute JSP pages, and the JSP interpreter is Tomcat.

Apache: focus on HTTPServer, Tomcat: focus on Servlet engine, if run in Standalone mode, it is functionally equivalent to Apache and supports JSP, but not ideal for static web pages

Apache is the Web server, Tomcat is the Java server, it is just a Servlet (JSP is also translated into Servlet) container, can be thought of as an extension of Apache, but can be run independently of Apache.

In practical use, Apache and Tomcat are often integrated:

If the client requests a static page, only the Apache server is required to respond to the request. If the client requests a dynamic page, the Tomcat server responds to the request. Because JSP interprets the code on the server side, integration can reduce the service overhead of Tomcat.

It can be understood that Tomcat is an extension of Apache.

2. Comparison between Nginx and Apache

1) the advantages of nginx over apache

Lightweight, the same as web services, it takes up less memory and resources to resist concurrency than apache. Nginx processes requests asynchronously and non-blocking, while apache is blocking. Under high concurrency, nginx can maintain a highly modular design with low resources, low consumption, high performance, and relatively simple to write modules to provide load balancing.

The community is active and all kinds of high-performance modules are produced quickly.

2) the advantages of apache over nginx

Apache's rewrite is stronger than nginx's.

Support for dynamic pages

Support a large number of modules, basically covering all applications

The performance is stable, while nginx is relatively more than bug.

3) comparison of their advantages and disadvantages.

Nginx configuration is simple and Apache is complex.

The static processing performance of Nginx is 3 times higher than that of Apache.

It is relatively simple for Apache to support PHP, and Nginx needs to be used with other backends; Apache has more components than Nginx

Apache is a synchronous multi-process model, with one connection corresponding to one process; nginx is asynchronous, and multiple connections (ten thousand levels) can correspond to one process.

Nginx handles static files well and consumes less memory.

Dynamic requests are done by apache, and nginx is only suitable for static and reverse.

Nginx is suitable to be a front-end server with good load performance.

Nginx itself is a reverse proxy server and supports load balancing

Summary

Nginx advantages: load balancing, reverse proxy, the advantage of handling static files. Nginx processes static requests faster than apache

Apache advantages: compared to the Tomcat server to deal with static files is its advantage, fast. Apache is static parsing, suitable for static HTML, pictures, and so on.

Tomcat: dynamic parsing container, handling dynamic requests, is a container for compiling JSPServlet. Nginx has a dynamic separation mechanism. Static requests can be processed directly through Nginx, and dynamic requests are forwarded to the background and handed over to Tomcat for processing.

Apache has advantages in dealing with dynamics, Nginx concurrency is better, CPU memory footprint is low, if rewrite is frequent, then Apache is more suitable.

That's all of the article "what's the difference between Tomcat and other WEB containers in JavaWeb?" Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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