Large scale Microservice based applications such as Netflix use different databases for each Microservice. This approach helps the services stay independent of each other. A schema change in one of the service databases does not impact the rest of the services. This approach increases the complexity of data management as the systems may get out of sync or become inconsistent.

A custom or ready-made Master Data Management (MDM) tool should be used that operates in background to fix any inconsistencies. For example, an MDM tool can be used to find inconsistencies in customer ID across databases: