Replication Options

This page describes the replication options offered by Cloud SQL.


Google Cloud SQL provides the ability to replicate a master instance to one or more read replicas. A read replica is a copy of the master that reflects changes to the master instance in almost real time.

Google Cloud SQL supports the following read replication scenarios:

Name Master Replica Benefits and use cases More information
Read replica Cloud SQL instance Cloud SQL instance
  • Additional read capacity
  • Analytics target
External read replica Cloud SQL instance MySQL instance external to Cloud SQL
  • Reduced latency for external connections
  • Analytics target
  • Migration path to other platforms
External master MySQL instance external to Cloud SQL Cloud SQL First Generation instance
  • Data replication to Google Cloud Platform
  • Analytics target
  • Migration path to Cloud SQL

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Cloud SQL for MySQL