Migrating to ClickHouse Cloud in just three months with no downtime: A 120 terabyte data journey and its benefits

Azur Games migrated a 120 TB database to ClickHouse Cloud on AWS without causing any downtime in their analytics, achieving significant storage reliability and operational reliability improvements. The migration process took three months of active work from two engineers and one month of the author's time. Despite a slight increase in maintenance costs, the benefits gained more than compensated for this, as it freed up half the time of two engineers, reduced stress, and allowed them to focus on creation and more interesting tasks. The company also experienced faster completion times for various business tasks and improved overall system performance with minimal effort.