In the context of modernizing development processes and ensuring seamless data synchronization between multiple databases, the article explores using Couchbase and GlueSync to replicate data in real-time between relational databases like Microsoft SQL Server and Oracle, and NoSQL databases such as Couchbase. The tutorial demonstrates setting up and configuring this system using Docker, and involves steps like running and configuring Couchbase and MSSQL, creating a GlueSync configuration file, and executing data synchronization. It provides detailed instructions on setting up Docker containers for both databases, configuring necessary user accounts, and utilizing Couchbase's Eventing service for data replication. The article emphasizes the utility of GlueSync in facilitating data transitions during modernization phases, highlighting its ability to synchronize changes and ease database integration without the need for extensive custom code.