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ChiHam
ChiHam

Reputation: 85

AWS Reserve Instance Billing

I have about 8 EC2 Windows t2.small instances iam paying about $0.03 (on-demand) Total is about 5840 hrs/month. If I buy 1 reserve instance for 1 year is a total of about 8760 hrs

Will the bill for this reserve instance be applied to all my 8 EC2 pricing ? Or will it be only applied to 1 of them ?

I ask these because I am not sure I will have all 8 instances for 1 year, but I am sure I will have them for at least 3 months. So I can pay upfront for 17520 hrs of EC2 t2.small Windows.

All my EC2 run 24/7

Upvotes: 1

Views: 231

Answers (3)

John Rotenstein
John Rotenstein

Reputation: 269101

The simplest way to think of a Reserved Instance is that you are pre-purchasing (annually or monthly) the right to run one matching instance every hour of the year at now hourly cost.

(Things get a bit more complicated with Linux per-second pricing.)

Upvotes: 0

helloV
helloV

Reputation: 52375

As long as you run at least one t2.small instance running all the time, your reserved instance rate will be applied to that instance.

  • If you have 8 instances running, 7 will be charged on-demand price one will be charged for reserved instance price.

  • If you have 2 instances running, you will be charged one for on-demand and one for reserved instance.

  • If you have no instance running, you will be charged for one reserved instance.

  • If you will be running the instance for three months only, do not buy reserved instance since it is not cost effective. Instead try the Reserved Instance Marketplace, where some people sell their unused reserved instances.

Upvotes: 2

Mahesh Varak
Mahesh Varak

Reputation: 129

If you buy 1 reserve instance for 1 year then you'll be charge separately for that 1 reserved instance.It is calculated on the basis of reserved instance rate.

Rest all will be charged on the "on-demand" basis rate.

Upvotes: 1

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