As a Database Administrator in TechSoft Solutions, I've led numerous data migrations, particularly during system upgrades or transitions to cloud-based servers. A key project was migrating a large-scale, heavily-used ERP database from an on-premise Oracle database to a cloud-hosted Amazon RDS instance.
The task demanded in-depth planning and strategizing for minimal disruption. We decided to apply a combination of Trickle and Big Bang migration methods. An initial data load was performed during off-peak hours to reduce the load on our system. Post this, changes were continually replicated using the Oracle GoldenGate tool until the final switchover.
The migration achieved its planned objectives with minimum downtime and negligible data loss. This project not only honed my data migration skills but also underlined the importance of strategic planning and rigorous testing in successful data migration.