I am new to spot instance use in amazon web services. I have a basic question. If a user acquires certain number of spot instances at a bid price and the SPOT price increases in the subsequent hours, will he loose all the spot instances or some of them? Also is there any other cloud providers providing this kind of service? can we dynamically increase or decrease our bid while our spot instance is running?
In case of spot instance, what is the meaning of "shut down your instance" when spot price goes above your bid price. Is the node still accessible for shutdown or its just a logical command to perform so that you can create another spot instance elsewhere in future? what is the benefit of this "shutdown spot instance" for a user? is there a way to tell for automatic shutdown of spot instance when the bid is less than spot price and amazon terminated the spot instance?