Efficient method to address concurrent requests in a successfully e-commerce platform

Created by: berrytchaks

Hi,

Given a successfully e-commerce platform like Amazon, when there are millions of sellers and buyers. If a seller is selling many 20 articles and receives 30 concurrent buying request from customers. How will the platform addresses effectively and efficiently all those concurrent requests.

Here is what I thought of: Synchronizing the database for any buying request. The problem here is that we will have some latency and performance issues.

Any Better Solutions. Thanks.