AWS Interview DropIntermediate TierConcept+25 XP on read
When would you use EC2 Spot Instances in production, and how do you design a workload to survive interruptions?
Core Summary
Spot is unused EC2 capacity sold at a steep discount, usually 60 to 90 percent off On-Demand, with the trade that AWS can reclaim it with two minutes of warning. It's a good fit for anything stateless, retryable, or checkpointed, and a bad fit for anything that can't tolerate an interruption.
Hints
Hint 1: The two-minute interruption notice is the whole design constraint
Hint 2: Spot fleets with multiple instance types survive capacity gaps better than one type
Hint 3: Never put your only replica of anything stateful on Spot alone