How to use redis to realize an e-commerce second kill function in PHP

PHP how to use redis to achieve an e-commerce second kill function, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can get something.

Implementation principle: list two-way linked list

Use redis queues because pop operations are atomic and are executed sequentially even if many users arrive at the same time. (mysql transactions have a significant performance degradation under high concurrency, as well as file locking.

The list data type in Redis is used here:

Stack: add elements from the head of the linked list, first in and then out

Queue: add elements from the end of the linked list, first in, first out

Redis saves data with key and value,key and value either of type String or of type byte []

Step 1: put the inventory of goods in the queue first

Step 2: start snapping and set the cache cycle for inventory

Step 3: the client executes the operation of placing an order and determines the inventory of the redis queue before placing the order