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Why to use the nginx+lvs architecture, I believe that many inexperienced people do not know what to do, so this paper summarizes the causes of the problem and solutions, through this article I hope you can solve this problem.

What is the difference between nginx and lvs as representatives of reverse proxies? nginx is developed based on layer 7 protocol and adopts the principle of asynchronous forwarding, that is, a new server linked to the load balancer will be set up while maintaining the client link, waiting for the server to return the data before returning it to the client. One advantage of this is that nginx can fail over (failover), that is, if the link with a server is not smooth, you can change the link to ensure the stability of the service. Lvs is developed based on layer 4 protocol and adopts the principle of synchronous forwarding, that is, when lvs listens to a port with a link, it will redirect directly to the server, allowing the server to link directly with the client. This has a drawback, that is, an one-shot deal, if the request fails, there will be no more failover. So why nginx and lvs?

Because the forwarding mode of nginx is destined to hit all traffic on nginx, there is a bandwidth bottleneck. Lvs does not actually establish links directly. Using a mixture of nginx and lvs can provide high quality service and more links.

After reading the above, have you mastered the method of why the nginx+lvs architecture is adopted? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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