Cost optimization

Question 1

Cost Optimization

Answer 1

EC2 Reserved Instances;
the more you pay upfront, the more you save;
some instances can be sold for a fee;

Question 2

Low utilization

Answer 2

• • Save costs by minimizing the number of EC2 instances in-use
• • Set CloudWatch alarms to spin down underutilized instances;
• • Find the right balance between availability and cost

Question 3

idle load balancers

Answer 3

remove unused load balancers since we pay per load balancer;

Question 4

EBS volumes

Answer 4

• • Delete unused volumes;
  • • take a snapshot if you want to keep the data
• • provisioned IOPS cost more
  • • make sure you are not provisioning more than necessary.
• • Downsize volumes that aren’t anywhere near full capacity.

Question 5

Unassociated Elastic IP addresses

Answer 5

EIPs cost money when not in use – disassociate them
Having more than one EIP associated to an instance costs money
EIPs on stopped instances cost an hourly fee

Question 6

Idle Amazon RDS DB instances

Answer 6

Take snapshots of unused DB instances, and delete them

– you can check if an instance has 0 connections for a certain period of time.