createCapacityReservation
Creates a new Capacity Reservation with the specified attributes. Capacity Reservations enable you to reserve capacity for your Amazon EC2 instances in a specific Availability Zone for any duration.
You can create a Capacity Reservation at any time, and you can choose when it starts. You can create a Capacity Reservation for immediate use or you can request a Capacity Reservation for a future date.
For more information, see Reserve compute capacity with On-Demand Capacity Reservations in the Amazon EC2 User Guide.
Your request to create a Capacity Reservation could fail if:
Amazon EC2 does not have sufficient capacity. In this case, try again at a later time, try in a different Availability Zone, or request a smaller Capacity Reservation. If your workload is flexible across instance types and sizes, try with different instance attributes.
The requested quantity exceeds your On-Demand Instance quota. In this case, increase your On-Demand Instance quota for the requested instance type and try again. For more information, see Amazon EC2 Service Quotas in the Amazon EC2 User Guide.