How to limit the number of connections in nginx speed limit

Scenario:

There are 100 people in company a, and company a only has one public IP. Assume that there may be 100 people in company a downloading your website files at the same time.

However, your connection limit is configured as:

limit_conn_zone $binary_remote_addr zone=perip:1m;
server {
 ---
 limit_conn perip 1;
 limit_rate 1024k;
 ---
}

A single connection is allowed, and the maximum bandwidth for a single connection is 1m.

In this way, 99 people will have a request status of 503. Others must wait manually if they want to download (nginx will not notify users that user a has finished downloading, and it is your turn for user b to download). This results in an extremely poor user experience. But the advantages are also obvious, and the bandwidth will soon drop.

Someone may ask, are you trying to cause trouble by limiting the number of connections to a very low number? No, absolutely not. How likely are the first 100 people to download website resources at the same time? I haven't done any statistics, but it's extremely unlikely. Moreover, the front-end page and download resources do not share the same domain name, so access to the front-end page will not be affected.
Who is using a lot of connections? Divided into two categories:

• Download tool category (Thunder).

• Various collection programs.

• Perform multiple download tasks at the same time.

Xiao Ming was watching TV happily. He glanced at the left screen and held the straw. The bandwidth was full again. Come on, limit the speed.

limit_conn_zone $binary_remote_addr zone=perip:1m;
server {
 ---
 limit_rate 1024k;
 ---
}

Xiao Ming did it As for the speed limit, ok, let me tell you who is speed-limited. Of course, it is the browser download user. The downloader of 360 Browser may not be able to limit it. Okay, let’s calculate the speed.

Browser: 2014k

Downloader: 1024 * 15 (maximum number of connections) *vip

Collector: 1024 *Connect Number

So we get the following conclusion:

Bandwidth is limited, the situation of simultaneous downloads from the same IP is very small, or it is a predictable business, try to connect the The number limit is smaller.

On the contrary, don’t limit it. Just reduce the bandwidth of a single connection! You want to know who among you can use the downloader that comes with the browser to download?

Note: This article only discusses the speed limit of nginx speed limit module under different businesses

Easter egg: Occasionally found that limiting the number of connections to 1 Thunder cannot Downloaded at high speed.

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