[ridruejo]

In addition to reserved instances, there are a couple of other ways you can achieve cost-savings for common situations. If you need to run background tasks (like video encoding, reports, etc) you can try running spot instances at a fraction of the cost of an on-demand instance. You run the risk that the instance is terminated, but you can always spawn a new one without affecting the main service, since basically you do not care if the task finishes a couple of minutes later. Another one is scaling up and down base on demand. If you run, say, a SugarCRM instance for your sales team, you can have it run in a Large instance during the week, 9-5pm, when it is going to be in full use by multiple people. Then, the rest of the time you can scale down to a small or micro instance. It is still going to be available, but at a smaller cost.