I just started getting familiar with EC2's Spot Requests and Spot Instances (1 day into it!). I understand that I can save some money doing a Spot Request to create a Spot Instance as opposed to creating an on-demand Instance.
What I don't understand is the correct way to "shut things down". If I want to make sure that I'm no longer charged, do I need to to cancel the Spot Request and terminate the Spot Instance?
I noticed that I could solely terminate the Spot Instance: what would this mean in terms of my Spot Request which exists without my instance?