Should the Database per service pattern be used in microservice architecture design?

The "Database per service" pattern in microservice architecture means that each microservice has its own database. This helps achieve the following goals:

• Data isolation: changes in one database do not affect other services.
• Deployment independence: services can be updated and scaled separately.
• Increased fault tolerance: a failure in one database does not affect other services.

However, there are also disadvantages:

• Complexity in ensuring data integrity and consistency across services.
• The need to implement inter-service communication for data synchronization.

Overall, applying this pattern is recommended when building microservices to maintain their independence and flexibility. But one should be prepared for additional complexity in data integration and management.