Tuesday, 17 May 2022

AWS RDS

Scale DB Storage

If auto scaling enabled, still need to meet condition below

  • Need to set max threshold
  • Free storage is 10% low
  • at least 5 minutes in this low storage state
  • 6 hours have passed since the last scalling

RDS Read replicas

It is for read only. It is async. The read replicas can be set up as multi AZ for Disaster Recovery. If master is not encryted, read replicas can not be encryted.

  • Up to 5 read replicas
  • Within the same AZ
  • Cross AZ
  • Cross regions

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