Online DDL and Zero Downtime Schema Migrations in Distributed Databases

--- title : " Zero Downtime Schema Migrations in Distributed Databases" published : true description : " A practical walkthrough of how CockroachDB, YugabyteDB, TiDB, and Spanner handle online DDL vs PostgreSQL — and migration strategies that actually work on sharded clusters." tags : postgresql, devops, architecture, cloud canonical_url : https://blog.mvpfactory.co/zero-downtime-schema-migrations-distributed-dbs --- ## What You Will Learn By the end of this tutorial, you will understand how dis