Move capacity between Capacity Reservations
You can move capacity from one Capacity Reservation to another to redistribute your reserved compute resources as needed. For example, if you need additional capacity in a reservation with growing usage, and you have capacity available in another reservation, then you can reallocate that capacity between the two reservations.
Prerequisites for moving capacity
As a prerequisite, the two Capacity Reservations must meet the following requirements:
-
Both reservations must be in the active state.
-
Both reservations must be owned by your AWS account. You cannot move capacity between reservations owned by different AWS accounts.
-
Both reservations must have the same:
-
Instance type
-
Platform
-
Availability Zone
-
Tenancy
-
Placement group
-
End time
-
The destination Capacity Reservations instance eligibility (open or
targeted), and tags, don't have to match the source reservation.
The configuration of both reservations remains the same, except that the source
reservation has reduced capacity and the destination reservation has increased
capacity.
When you specify the quantity of instances to be moved, by default, any available capacity is moved first, followed by any eligible running instances (the used capacity in your reservation). For example, if you move 4 instances from a reservation with 5 used instances and 3 available instances, then the 3 available instances and 1 used instance will be moved.
Note
When you move used capacity from your reservation by specifying a Quantity to move that's greater than the available
capacity, only the instances that were launched with their Capacity Reservation Specification as open will be
moved.
Considerations
The following considerations apply when moving capacity from one reservation to another:
-
The used capacity can only be moved between Capacity Reservations with
openinstance eligibility that are shared with the same set of accounts. -
When you move used capacity, the eligible instances are randomly selected. You cannot specify which running instances are moved. If a sufficient number of eligible instances are not found to fulfill the move quantity, the move operation will fail.
-
If you move all of the capacity from the source reservation, the Capacity Reservation will be automatically canceled.
-
Future-dated Capacity Reservations — You can't move capacity for a future-dated Capacity Reservation during the commitment period.
Note
Moving capacity from a Capacity Block isn't supported.
Move capacity
To move capacity from a source Capacity Reservation to a destination Capacity Reservation, you can use the Amazon EC2 console or the AWS CLI.
