Why are we using AWS spot instances?

Probably quite a few of you use AWS with On-demand or reserved instances, but you are still afraid of the spot instances. Is it because the spot market is so unpredictable? What would you say if I told you that you can use spots without fear? What is the spot market? You can learn more about it on the AWS Website Simply speaking, Amazon has a lot of unused resources which you can freely bid.

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