What is the difference between online and offline database migration?

Date:2023-01-07
Online database migration is a process where an existing database is directly moved to a new server without any disruption to the users. It involves minimal downtime and is used when the database schema needs to remain the same i.e. if no changes are required. Offline database migration, on the other hand, is when an existing database is taken offline temporarily and its data is exported, usually to a .csv file or some other format, which can then be imported into the new database. This is used when changes are needed to the schema or when the database is too large to handle in-line. This method also involves more downtime as it cannot be done in real-time.
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