Shulou(Shulou.com)05/31 Report--

In this issue, the editor will bring you about how to compare haproxy and lvs. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

The difference between https://blog.csdn.net/wangshuminjava/article/details/80539711 layer 4 and layer 7 load balancing the so-called layer 4 is the fourth layer in the ISO reference model. Layer 4 load balancing, also known as layer 4 switch, is mainly achieved by analyzing the traffic of IP layer and TCP/ UDP layer based on IP plus port load balancing. The common load balancers based on four layers are LVS, F5 and so on. Take common TCP applications as an example. When the load balancer receives the first SYN request from the client, it selects the best back-end server through the set load balancing algorithm, modifies the destination IP address in the message to the back-end server IP, and then forwards it directly to the back-end server. Such a load balancer request is completed. From this process, a TCP connection is established directly between the client and the server, while the load balancer only completes a forwarding action similar to that of a router. In some load balancing strategies, in order to ensure that the message returned by the back-end server can be correctly delivered to the load balancer, the original source address of the message may be modified while forwarding the message. + * and HAProxy are used to detect and load balance the backend MySQL nodes, but the performance is not as good as LVS when the number of MySQL slaves in the backend exceeds 10. Therefore, it is recommended that LVS+, which can match the information in the requested url and header, has a better layer 7 implementation than lvs. This is how the haproxy and lvs shared by the editor are compared. If you happen to have similar doubts, please refer to the above analysis for understanding. If you want to know more about it, you are welcome to follow the industry information channel.

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