🔗 Migrating 6.5 billion rows from MongoDB

Fathom Analytics successfully migrated 6.5 billion rows of historical data from the Gauges platform’s MongoDB database to ClickHouse, enhancing their analytics capabilities. This undertaking involved a dual challenge: rebuilding an application in Laravel and ensuring that data migration occurred seamlessly while maintaining live service. Jack Ellis shared the thoughtful approach taken to create a migration API, tackle performance bottlenecks, and preserve existing tracking interfaces for customers. The process not only streamlined their infrastructure but also reduced hosting costs significantly, showcasing a remarkable feat in data management and application development. The article is a detailed account of the technical solutions and challenges faced during this massive data migration project.