how to reserve a running amazon ec2 instance?

amazon-ec2 cloud
Soumava picture Soumava · Sep 29, 2010 · Viewed 15.3k times · Source

we have a large ec2 instance running in asia pacific region.we want to reserve that particular instance.In aws management console we see an option to purchase a reserved instance but there seems to be no option to change this instance into a reserved one.Are we missing out on something

Answer

mgarg picture mgarg · Sep 29, 2010

Reserved instances are a billing feature, not a technical feature.

You can purchase a reserved instance and the discounted hourly rate will apply to already-running instances, without needing to do anything to them. Just make sure the reserved instances you purchase are: - in the same availability zone as your already-running instances - of the same instance type (m1.small, c1.medium, etc) as your already-running instances.

As soon as the reservation cost clears your credit card you will see the discounted hourly rate take effect for your already-running instances.

Amazon's docs could be a lot clearer on this. http://aws.amazon.com/ec2/reserved-instances/#4

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