Spotinfo
TL;DR
The spotinfo is a command-line tool you can use for exploring AWS Spot instances.
Introduction
Using Amazon EC2 Spot instances is an excellent way to reduce EC2 on-demand instance cost, up to 90%. Whenever you have a workload that can survive VM interruption or be suspended and resumed later on without impacting business use cases, choosing the Spot pricing model is a no-brainer choice.
The lower your interruption rate, the longer your Spot instances are likely to run.