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Do microservices need to have their own database?
The short answer is yes. In order to be able to independently develop microservices , they must be loosely coupled. Each microservice’s persistent data must be private to that service and only accessible via it’s API .
Can one Microservice have multiple database connectivity?
The application will be built in a microservice architecture. We all know that for a monolith app all you need is one DB (MongoDB, MySQL etc etc) but for a micro one you can have multiple databases.
Why should each Microservice have its own database?
It would allow you to pick the database technology which fits your Business requirement best in order to get the best performance or usage of it. For example some specific micro-service might have some Read-heavy operations with very complex filter options and a full text search requirement.
How does each microservice really need its own database?
One option is to encapsulate the user profile data with a service, that’s then called by other services. Another option is to use an event-driven mechanism to replicate data to each service that needs it. In summary, it is important that each service’s persistent data is private.
The data is shared between all application’s components. By contrast, in a microservices application, data ownership is decentralized. Every service is autonomous and has its own private data store relevant to its functionality. This means that one service can’t modify any data stored inside the other service’s database.
Do you need a database server for each service?
You do not need to provision a database server for each service. For example, if you are using a relational database then the options are: Private-tables-per-service – each service owns a set of tables that must only be accessed by that service Database-server-per-service – each service has it’s own database server.
Which is a characteristic of a microservices architecture?
The core characteristic of the microservices architecture is the loose coupling of services. To achieve that, each service must have its own private data store. So, building the database architecture for microservices almost always requires following the database-per-service pattern.