What are hidden costs or “NOT obvious” costs on AW

问题:

AWS says that everything is "pay as you use". But are there any hidden costs or "NOT obvious" costs on AWS ?

回答1:

Costs which generally are ignored by people and can give shock:

1. It is recommended that we deploy our application in Multi AZ for High availability. We assume that data transfer between these servers will be free as this is like intranet; but that is not true. There are charges ( around 10% of internet bandwidth charges ) for data transfer across AZ in same region.

2. Data transfer within AWS and across AWS regions is also charged.

3. On AWS Aurora; by default provisioned IOPS are enabled which leads to a huge bill.

4. If Versioning is enabled on S3; then u need to pay for all versions of every object.

These are not hidden charges but can give you a shock:

1. Even on other RDS; if u use provisioned IOPS it leads to a huge bill depending on usage.