Contract Renewal

Spot Instance Requests:
- One-Time Requests: These are fulfilled once and do not automatically renew. Once the instance is terminated, the request is not resubmitted.
- Persistent Requests: These requests are automatically resubmitted after the Spot Instance is interrupted. This means that as long as the request remains active, AWS will continue to attempt to fulfill it whenever capacity is available.
Spot Fleet Requests: Spot Fleet: A Spot Fleet request can include both Spot and On-Demand Instances. The fleet will attempt to maintain the target capacity by launching new instances as needed. This can be configured to persist, ensuring continuous attempts to fulfill the capacity requirements.

Cancellation of Spot Requests:

Canceling Spot Requests:
- Users can cancel Spot Instance requests at any time. If a Spot Instance request is canceled, any running instances associated with that request will be terminated, and no new instances will be launched.
- To cancel a Spot request, users can use the AWS Management Console, CLI, or API. It is important to cancel both the Spot request and terminate the Spot Instance to ensure no further charges.
Persistent Requests: If you have created a persistent Spot Instance request, simply terminating the Spot Instance will not stop new instances from being launched. You must cancel the Spot request itself to prevent further instances from being created.
Spot Fleet Requests: Similar to individual Spot requests, Spot Fleet requests can also be canceled. This will terminate all instances associated with the fleet and prevent any new instances from being launched.

Interruption and Termination:

Interruption Notices:
- Spot Instances can be interrupted by AWS with a two-minute warning if the capacity is needed back or if the Spot price exceeds the user's maximum bid.
- Users can specify the interruption behavior (terminate, stop, or hibernate) when creating Spot requests. This allows for some control over how instances are handled during interruptions.
Billing for Interrupted Instances:
- If a Spot Instance is interrupted by AWS within the first hour, users are not charged for that partial hour. However, if the instance is terminated by the user, charges apply for the partial hour used.
- For subsequent hours, users are billed to the nearest second for the time the instance was running.