Design Microservices Architecture with Patterns and Principles - Problem: Dual Write Problem

The video tutorial discusses the dual write problem, which occurs when an application needs to change data in two different systems, such as a database and a message queue. This can lead to inconsistent states if one of the writes fails. The tutorial provides an example using microservices and explains why solving dual write problems is challenging. It also explores solutions like the transactional outbox pattern and change data capture (CDC) to avoid these issues in microservices.

What is the dual write problem and how does it occur in microservices?

Explain the consequences of a dual write problem in a system.

Describe the typical case when using local transactions with external systems.

What are the potential solutions to avoid the dual write problem in microservices?

How do distributed transactions help in avoiding dual write problems?

What is the transactional outbox pattern and how does it relate to dual write problems?

Discuss the challenges of using two-phase commit protocols in microservices.