Data Management

Abstract

In most business services, the service logic is built on top of an underlying persistent layer. Often a database is used as the persistent layer and it is acting as the system of record for a given service. As we’ve discussed, microservices are built as autonomous entities and should have control over the data layer that they operate on. This essentially means that microservices cannot depend on a data layer that is owned by or shared by another entity. So, in the process of building autonomous services, it is also required to have an isolated persistent layer for each microservice. In this chapter, we discuss the commonly used patterns and best practices for transforming centralized or shared database-based enterprise applications to microservices that are based on decentralized databases.