Refer to DataHub GMS Service to have a quick understanding of the architecture and responsibility of this service for the DataHub.
While GMS defaults to using MySQL as its storage backend, it is possible to switch to any of the database platforms supported by Ebean.
For example, you can run the following command to start a GMS that connects to a PostgreSQL backend.
(cd docker/ && docker-compose -f docker-compose.yml -f docker-compose.postgre.yml -p datahub up)
or a MariaDB backend
(cd docker/ && docker-compose -f docker-compose.yml -f docker-compose.mariadb.yml -p datahub up)