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Buying RI will not (always) guarantee resources!

You stated that buying "Reserved Instances is the only way to guarantee that resources will be available when needed" this is not (always) true. Only when selecting AZ when purchasing the RI, will guarantee the resources. In addition, you can also use On-Demand Capacity Reservations to also reserve capacity

1 Answers

Hi Tszlar, 

Yes you’re correct.  I cover this in the Spot and Reserved Instance video in the Cost Management chapter at 00:23.


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