Continuous Sync — Microsoft Azure Solutions Architect (AZ-305) Practice Questions
Continuous sync in the context of database migration refers to the ongoing replication of changes from a source database to the target while both systems remain operational, enabling a low-downtime cutover. The AZ-305 exam tests this concept primarily in relation to Azure Database Migration Service's online migration mode, which uses change data capture or log-based replication to keep the target current. Architects must understand that continuous sync introduces a brief final-sync phase at cutover during which the source is quiesced and residual changes are applied to the target before traffic is redirected. Designing the cutover window, monitoring replication lag, and planning rollback procedures are all considerations the exam may present in migration scenario questions.