What problems did you encounter during the migration process?

When performing migration work, I often encountered the following problems:

• Data schema incompatibility — changes in the database structure or data format can lead to errors during reading or writing.

• Data loss — incorrect transfer or transformation of data can result in partial information loss.

• Long downtime — migrating large volumes of data may require stopping services, affecting availability.

• Migration script errors — syntax or logical errors can lead to incorrect database states.

• Performance issues — migration can heavily load the system, slowing down other processes.

• Lack of rollback — if a rollback mechanism is not provided, restoring the previous state is difficult.

To minimize these problems, it is important to carefully plan migrations, test on data copies, use transactions, and have backups.