Spot instances come from both leftover on-demand instances as well as unused res... | Hacker News

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		jedberg on Jan 2, 2013 \| parent \| context \| favorite \| on: Pinterest Cut Costs from $54 to $20 Per Hour With ... Spot instances come from both leftover on-demand instances as well as unused reserved instances. So it's quite possible to run out of on-demand and still have a low spot price.

cperciva on Jan 2, 2013 [–]

It's possible, sure... but only if the people who find that they can't launch on-demand instances don't think to try spot instances instead.

jedberg on Jan 2, 2013 | [–]

Many people aren't set up to handle spot instances. You need to be much more resilient to single instance failures than when using on-demand or reserved instances.

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