7.1

The allocated machine quota includes only machines that are powered on. For example, if a reservation
has a quota of 50, and 40 machines have been provisioned but only 20 of them are powered on, the
reservation’s quota is 40 percent allocated, not 80 percent.
n
The reservation must have the security groups specied in the machine request.
n
The reservation must be associated with a region that has the machine image specied in the blueprint.
n
The reservation must have sucient unallocated memory and storage resources to provision the
machine.
In a Pay As You Go reservation, resources can be unlimited.
n
For Amazon machines, the request species an availability zone and whether the machine is to be
provisioned a subnet in a Virtual Private Cloud (VPC) or a in a non-VPC location. The reservation must
match the network type (VPC or non-VPC).
n
For vCloud Air or vCloud Director, if the request species an allocation model, the virtual datacenter
associated with the reservation must have the same allocation model.
n
For vCloud Director or vCloud Air, the specied organization must be enabled.
n
Any blueprint templates must be available on the reservation. If the reservation policy maps to more
than one resources, the templates should be public.
n
If the cloud provider supports network selection and the blueprint has specic network seings, the
reservation must have the same networks.
If the blueprint or reservation species a network prole for static IP address assignment, an IP address
must be available to assign to the new machine.
n
If the request species an allocation model, the allocation model in the reservation must match the
allocation model in the request.
n
If the blueprint species a reservation policy, the reservation must belong to that reservation policy.
Reservation policies are a way to guarantee that the selected reservation satises any additional
requirements for provisioning machines from a specic blueprint. For example, if a blueprint uses a
specic machine image, you can use reservation policies to limit provisioning to reservations associated
with the regions that have the required image.
If no reservation is available that meets all of the selection criteria, provisioning fails.
If multiple reservations meet all of the criteria, the reservation from which to provision a requested machine
is determined by the following logic:
n
A reservation with a lower priority value is selected before a reservation with a higher priority value.
n
If multiple reservations have the same priority, the reservation with the lowest percentage of its
machine quota allocated is selected.
n
If multiple reservations have the same priority and quota usage, machines are distributed among
reservations in round-robin fashion.
N While round-robin selection of network proles is not supported, round-robin selection of
networks (if any) is supported, which can be associated with dierent network proles.
If multiple storage paths are available on a reservation with sucient capacity to provision the machine
volumes, storage paths are selected according to the following logic.
n
A storage path with a lower priority value is selected before a storage path with a higher priority value.
n
If the blueprint or request species a storage reservation policy, the storage path must belong to that
storage reservation policy.
Chapter 3 Configuring Resources
VMware, Inc. 193