7.2

A business group can have multiple reservations on the same compute resource or dierent compute
resources, or any number of reservations containing any number of machines.
A compute resource can also have multiple reservations for multiple business groups. In the case of virtual
reservations, you can reserve more resources across several reservations than are physically present on the
compute resource. For example, if a storage path has 100 GB of storage available, a fabric administrator can
create one reservation for 50 GB of storage and another reservation using the same path for 60 GB of storage.
You can provision machines by using either reservation as long as sucient resources are available on the
storage host.
Configuring Reservation Policies
When a user requests a machine, it can be provisioned on any reservation of the appropriate type that has
sucient capacity for the machine. You can apply a reservation policy to a blueprint to restrict the machines
provisioned from that blueprint to a subset of available reservations.
You can use a reservation policy to collect resources into groups for dierent service levels, or to make a
specic type of resource easily available for a particular purpose. When a user requests a machine, it can be
provisioned on any reservation of the appropriate type that has sucient capacity for the machine. The
following scenarios provide a few examples of possible uses for reservation policies:
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To ensure that provisioned machines are placed on reservations with specic devices that support
NetApp FlexClone.
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To restrict provisioning of cloud machines to a specic region containing a machine image that is
required for a specic blueprint.
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As an additional means of using a Pay As You Go allocation model for machine types that support that
capability.
Note Reservations dened for vCloud Air endpoints and vCloud Director endpoints do not support the
use of network proles for provisioning machines.
You can add multiple reservations to a reservation policy, but a reservation can belong to only one policy.
You can assign a single reservation policy to more than one blueprint. A blueprint can have only one
reservation policy.
A reservation policy can include reservations of dierent types, but only reservations that match the
blueprint type are considered when selecting a reservation for a particular request.
Reservation policies provide an optional means of controlling how reservation requests are processed. You
can apply a reservation policy to a blueprint to restrict the machines provisioned from that blueprint to a
subset of available reservations.
Machine Blueprints
A blueprint that contains a machine component species the workow used to provision a machine and
includes information such as CPU, memory, and storage. Machine blueprints specify the workow used to
provision a machine and include additional provisioning information such as the locations of required disk
images or virtualization platform objects. Blueprints also specify policies such as the lease period and can
include networking and security components such as security groups, policies, or tags.
A machine blueprint typically refers to a blueprint that contains only one machine component and the
associated security and networking elements. It can be published as a standalone blueprint and made
available to users in the service catalog. However, published machine blueprints also become available for
reuse in your design library, and you can assemble multiple machine blueprints, along with Software
components and XaaS blueprints, to design elaborate application blueprints for delivering catalog items that
include multiple machines, networking and security, software with full life cycle support, and custom XaaS
functionality to your users.
Foundations and Concepts
30 VMware, Inc.