Reply To: Cost optimization bw RDS

[Kenneth-Samonte-Tutorials-Dojo]

Hi Vu Hoang Nam,

Thanks for your feedback on this question.

I understand that RDS MySQL is a more cost-effective solution. However, in the exam, there is a difference between the cost-effectiveness and the recommended solution that is cost-effective (from AWS perspective).

Think of it this way, if you just want the cheapest solution, then using EC2 instances with MySQL installed is cheaper compared to an RDS instance. However, you will never see an answer on the exam to choose EC2 with MySQL because AWS does not want you to do manual work.

The questions on the exam are focused on choosing the right service (as per AWS) with the least amount for manual work. If one of the choices has the word “manually” on it, even if it is the cheapest option, it probably isn’t the correct option.

Here, cost-effective means choosing the AWS service that is least expensive while still maintaining the flexibility and automatic elastic scaling that AWS offers. Therefore, we should choose AWS Aurora in this question.

Hope this helps.

Let us know if you need further assistance. The Tutorials Dojo team is dedicated to helping you pass your AWS exam!

Regards,

Kenneth Samonte @ Tutorials Dojo