Boot EC2 Instances from EBS
EBS offers the ability to have a “virtual disk drive” whose lifetime is independent of any EC2 instance. You can attach EBS drives to any running instance, and any changes made to the drive will persist even after the instance is terminated. You can also set up an EBS drive to be the root filesystem for an instance - giving you the benefits of an always-on instance but without paying for it when it’s not in use - and this article shows you how to do that. I also explore how to estimate the cost savings you can achieve using this solution. ...