As high-load IT products
As high-load IT products evolve and scale, developers inevitably face the need to modernize their database infrastructure. This may involve changing table schemas, upgrading to a more modern DBMS version, or completely migrating physical servers to next-generation cloud storage. For small websites, maintenance is often performed overnight, with a "Site Under Maintenance" stub displayed. However, for large international platforms serving users in different time zones, even a one-hour downtime can cost users loyalty. A detailed analysis of Zero-Downtime data migration technologies is available at https://liraluck.net . To implement a seamless data transfer without shutting down website interfaces, engineers employ a two-phase migration strategy using Change Data Capture (CDC) systems such as Debezium or AWS DTS. In the first phase, an exact mirror copy of the target database is created on the new server. The CDC system then connects to the source database's transaction lo...