人人秒杀Redis助力商城瞬间火爆（人人商城秒杀redis）

People are increasingly accustomed to using their mobile phones to purchase their favorite products at the moment, instead of wasting time shopping in physical stores. There is an excellent promotion system such as second-kill activity. Shopping malls often launch second-kill promotions for limited goods to attract customers, and the goods are sold within a few seconds. The success of this kind of promotion depends on the underlying IT architecture.

To achieve fast response and multi-user concurrent access to goods in second-kill activities, it is essential to use high-performance storage technology. Redis is a key-value distributed memory database, which is widely used because of its excellent performance and scalability. It can easily solve the scalability problem of Internet applications such as websites and online shopping malls.

For example, the online shopping mall can use Redis to cache goods data to prevent resource pressure caused by the large number of repeat visitors. Then, the shop can set up a distributed lock on the goods with distributed atomic transactions, so that the goods order can be synchronized in real-time. At the same time, if the goods become a hot commodity, an alarm module can be set up with Redis’s publish/subscribe mechanism, so that the staff can quickly respond.

The following is a simple demonstration code, which uses the Redis command to set a distributed lock and perform atomic transactions to purchase goods:

#Set a distributed lock
SETNX key value

#Perform atomic transactions to purchase goods
MULTI
INCR goods.number
DECR goods.inventory
EXEC

At last, for a large-scale website or shopping mall, it is necessary to consider the problem of data replication. The well-designed Redis cluster can better realize the data scalability of the application.

In summary, Redis is an ideal solution for second-kill activities due to its excellent performance, scalability and strong data security. By using Redis, it is possible to quickly respond to a large number of visitors at the same time and ensure the consistency of data. Therefore, Redis is a great help for e-commerce to create a smooth second-kill activity.