The core philosophy of MSA is the decentralization of software design and development. The decentralization not only guides the organization of business logic but also how data has to be persisted.
In a monolithic architecture, application components and data are traditionally centralized. One of the SQL databases, such as SQL server, is used as a single database with multiple tables. This is the way data gets persisted in the previous era. Some portions of the application logic even get delegated to the SQL server database in the form of stored procedures, complex joins, and so on.
