Benjamin Cane • 7/3/2026

Need to migrate from one database to another without downtime?

This article discusses the dual writes approach for migrating from one database to another without downtime. It explains what dual writes are, how they work by sending every write to both databases, and the challenges of handling partial failures where one database succeeds and the other fails. The article highlights where dual writes work best, such as systems with frequent updates and eventual consistency, and why teams use them to gradually migrate traffic while keeping both databases active. It concludes that dual writes add complexity but enable live migrations when downtime is not an option.

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#database migration #Application Architecture #Eventual Consistency