I want to reserve EC2 capacity for a scheduled workload, but I run the workload infrequently. Will Scheduled Reserved Instances work for me?

Scheduled Reserved Instances are different from Standard Reserved Instances in a few ways:

  • With a Scheduled Reserved Instance, you reserve fewer instance-hours than a Standard Reserved Instance, with a proportionally smaller commitment. The minimum commitment is 1,200 hours for a one-year term (or about four hours each day).
  • Scheduled Reserved Instances are billed entirely upfront. Standard Reserved Instances offer a few different upfront pricing options.
  • The guaranteed capacity and pricing for a Scheduled Reserved Instance apply only during the scheduled times you choose.
  • Not all instance types can be used with Scheduled Reserved Instances. For more information, see Scheduled Instance Limits.

Scheduled Reserved Instances work best for short-term or infrequent jobs that require a particular instance type on a regular basis, but that you don't run very often. A Scheduled Reserved Instance reserves the capacity in the Availability Zone you choose for the times that you need it.

You can purchase a Scheduled Reserved Instance from the Scheduled Instances pane of the EC2 console. After you purchase the instance, you can use the run-scheduled-instances AWS CLI command or a Lambda function to automatically start and stop the instance during the scheduled window.

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Published: 2017-05-31