High performance architecture design of wechat circle of friends

Business indicators

2021 year 1 month 19 Friday night , Zhang Xiaolong, the founder of wechat, appeared in the wechat open class live room , Once a year “ WeChat night ” Speech ...

According to the latest data released by zhangxiaolong himself ,

Now there are... Every day 10.9 100 million users open wechat ,3.3 Hundreds of millions of users made video calls ;

Yes 7.8 100 million users enter the circle of friends ,1.2 100 million users publish circle of friends , One of the photos 6.7 One hundred million , Short video 1 Billion bars ;

Yes 3.6 Billion users read official account articles ,4 Hundreds of millions of users use small programs .

High performance complexity analysis of circle of friends

The overall architecture is as follows ：

Design reasons

Development trend TPS according to 42 ten thousand , After sending the news , Follow the push mode （ Wechat can be up to 5000 Good friends , Pull mode is not considered for the time being ） Push it to wechat friends , Friends can see the latest news after opening the circle of friends . Suppose everyone has 200 Friend calculation , Need to push 42 ten thousand *200=8400 Ten thousand data , The circle of friends has low requirements for real-time , Can push asynchronously .

Like every second 420, After you like it, you need to show it , It requires high real-time performance , need redis cluster Support . Comments are similar to likes .