Differences, advantages and disadvantages between synchronous communication and asynchronous communication

Synchronous communication ： It's like making a phone call , Need real-time response .

Asynchronous communication ： It's like sending an email , No need to reply immediately .

Advantages of synchronous communication ：

• It has a strong timeliness , You can get immediate results

Disadvantages of synchronous communication ：

• High coupling degree

• Performance and throughput degradation

• There is additional resource consumption

• There is a cascading failure problem

Advantages of asynchronous communication ：

• Throughput improvement ： There is no need to wait for subscriber processing to complete , Faster response

• Fault isolation ： The service does not call directly , There is no cascading failure problem

• There is no blocking between calls , It will not cause invalid resource occupation

• Very low coupling , Each service can be plugged flexibly , alternative

• Traffic peak clipping ： No matter how volatile the traffic of the release event is , All by Broker receive , Subscribers can handle events at their own pace

Disadvantages of asynchronous communication ：

• The architecture is complex , There is no obvious business process line , Poor management

• Need to rely on Broker Reliability of 、 Security 、 performance