aslamnotes

rds - read replicas

1 min read

  • Upto 15 read replicas
  • Within AZ, Cross AZ or Cross Regional
  • Replication is Async, from the Master (eventually consistent)
  • Read Replicas can be promoted to be a own DB? Gets out of Replication
  • Application must update the conn string to leverage read replicas
  • Only select operation is allowed, not delete, insert, update
  • Use Case - Take away load from prod db, for external workload. And it is async. Eg, analytics.

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