Cache comprehensive project - seckill architecture

In the previous articles, we learned about read caching 、 Write caching and data collection scenarios , In this article, we will integrate these three aspects to implement a spike architecture .
The characteristics of secsha architecture are cannot meet the needs of the people , Generally speaking, goods will be robbed in two seconds , Subsequent users can only see the end of the second kill interface , Therefore, there will be a traffic peak in the first two seconds of the second kill . And the spike architecture design should ensure that the goods cannot be oversold 、 Order data cannot be lost 、 The server and database cannot crash 、 Try to shield the robot from stealing goods . Let's explain these four aspects .

One 、 Realize the idea

1.1 Architecture brief

Secsha architecture is a process of constantly filtering requests , Generally speaking, the seckill system is divided into 5 layer ： Static resources / Load balancing 、 gateway 、 Background server 、 cache and database . We try to handle user requests in the first and second layers , About how to intercept requests in the first and second layers , It needs to be considered in combination with the actual business .

1.2 Ideas

The business process of secsha system is divided into four layers ： Display page 、 Place an order 、 payment and result . Next, we will explain the implementation ideas for the four layers of the business process .

1.2.1 Show page intercept request

For the product display page , In most cases, we will use the content distribution network , That's what they say CDN, Use CDN The advantage is that we don't need to spend our own server resources , And fast response , The pressure of static resources can be transferred to external systems .
Since there are static resources ÿ