Make Migrating to MongoDB Atlas on AWS Easy with PeerIslands Modernization Tool Set` is an article discussing the challenges of migrating data from legacy relational databases to a cloud-based document database like MongoDB. It highlights the limitations of current tools in handling complex heterogeneous migration scenarios and introduces `1Data`, a platform developed by PeerIslands that helps enterprises perform migration and real-time synchronization of data between SQL databases and MongoDB. The platform provides a single, GUI-based platform for both one-time migration and continuous updates, with features such as automatic infrastructure management, scalable architecture, and modular design. The article also showcases the capabilities of `1Data` through a demo and emphasizes the benefits of modernizing to MongoDB, including faster development, improved data governance, and enhanced scalability.