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What is the difference between Apache and ngin servers? Many novices are not very clear about this. In order to help you solve this problem, the following editor will explain it in detail. People with this need can come and learn. I hope you can gain something.

Nginx

1. Lightweight, written in C, the same web service will take up less memory and resources

2. Anti-concurrency, nginx uses epoll and kqueue as the development model, processing requests is asynchronous and non-blocking, and the load capacity is much higher than that of apache, while apache is blocking. Nginx can keep low resources, low consumption and high performance under high concurrency, while apache is prone to surge in the number of processes and denial of service when PHP processing is slow or front-end pressure is high.

3. Nginx is good at handling static files, and its static processing performance is more than three times higher than that of apache.

4. The design of nginx is highly modular, and it is relatively simple to write modules.

5. Nginx configuration is simple, regular configuration makes a lot of things simple, and after changing the configuration, you can use-t to test whether there is any problem with the configuration. The apache configuration is complex, and it will crash when you find that the configuration is wrong when you restart.

6. Nginx, as a load balancing server, supports 7-tier load balancing.

7. Nginx itself is a reverse proxy server, and it can be used as an excellent mail proxy server.

8. It is very easy to start, and it can run almost continuously from 7 to 24, even if it runs for several months, it does not need to be restarted, and the software version can be upgraded with uninterrupted service.

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

Apache

1. Apache's rewrite is more powerful than nginx. When rewrite is frequent, use apache.

2. With the development of apache, there are so many modules that you can find anything you can think of.

3. Apache is more mature, less bug, and nginx has relatively more bug.

4. Apache super-stable

5. It is relatively simple for apache to support PHP, and nginx needs to be used with other backends.

6. Apache has advantages in handling dynamic requests, and nginx is a chicken rib in this respect. Generally, dynamic requests need to be done by apache, and nginx is suitable for static and reverse requests.

7. Apache is still the mainstream at present, with rich features, mature technology and development community.

Summary

The core difference between the two is that apache is a synchronous multi-process model, one connection corresponds to one process, while nginx is asynchronous, and multiple connections (ten thousand levels) can correspond to one process.

Generally speaking, for web services that require performance, use nginx. If you do not need performance only for stability, but also consider apache, the functional modules of the latter are better than the former, for example, the modules of ssl are better than the former, and there are more configurable items. Epoll (kqueue on freebsd) network IO model is the fundamental reason for high processing performance of nginx, but not in all cases epoll wins. If only a few files provide static services, apache's select model may have higher performance than epoll. Of course, this is only an assumption based on the principle of the network IO model, and the real application still needs to be measured.

A more general solution is that the front-end nginx is anti-concurrency and the back-end apache cluster will work better together.

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