The Cosmos DB SQL interface is being migrated to MongoDB Atlas, a cloud-based database service that supports multiple models, including the SQL interface. This migration involves both application refactoring and data migration from Cosmos DB to MongoDB Atlas, with the current tool set having limitations in terms of zero downtime requirements. To address these concerns, PeerIslands has developed a COSMOS SQL migrator tool that provides near-zero downtime capabilities through change data capture, using tools such as Kafka and KSQL to handle ongoing changes during the migration process. The tool offers a GUI-based interface for managing the entire migration process, making it easier for customers to migrate their applications without any downtime or disruptions.