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Database or Shared Data Pattern

Anjali Sharma answered on January 3, 2023 Popularity 3/10 Helpfulness 1/10

answer Database or Shared Data Pattern

Database or Shared Data Pattern

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For every application, there is humongous amount of data present. 
So, when we break down an application from its monolithic architecture to microservices, it is very important to note that each microservice has sufficient amount of data to process a request.
So, either the system can have a database per each service or it can have shared database per service. 
You can use database per service and shared database per service to solve various problems.  
The problems could be as follows:

Duplication of data and inconsistency
Different services have different kinds of storage requirements
Few business transactions can query the data, with multiple services
De-normalization of data
Well, to solve the first three problems, I think you can go for database per service, as it will be then accessed by the microservice API itself. 
So, each microservice will have its own database ID,  which thereafter prevents the other services in the system to use that particular database. 
Apart from this, to solve the issue of de-normalization, you can choose shared databases per service,  to align more than one database for each microservice.
		This will help you gather data, for the monolithic applications which are broken down into microservices.
        But, you have to keep in mind that, you have to limit these databases to 2-3 microservices; else, scaling these services will be a problem.

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Contributed on Jan 03 2023

Anjali Sharma

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