6.0.1

Remove a Resource Pool
You can remove a resource pool from the inventory.
Procedure
1 In the vSphere Web Client, right-click the resource pool and Select Delete.
A confirmation dialog box appears.
2 Click Yes to remove the resource pool.
Resource Pool Admission Control
When you power on a virtual machine in a resource pool, or try to create a child resource pool, the system
performs additional admission control to ensure the resource pool’s restrictions are not violated.
Before you power on a virtual machine or create a resource pool, ensure that sufficient resources are
available using the Resource Reservation tab in the vSphere Web Client. The Available Reservation value
for CPU and memory displays resources that are unreserved.
How available CPU and memory resources are computed and whether actions are performed depends on
the Reservation Type.
Table 9‑1. Reservation Types
Reservation Type Description
Fixed The system checks whether the selected resource pool has sufficient unreserved
resources. If it does, the action can be performed. If it does not, a message appears and
the action cannot be performed.
Expandable
(default)
The system considers the resources available in the selected resource pool and its direct
parent resource pool. If the parent resource pool also has the Expandable Reservation
option selected, it can borrow resources from its parent resource pool. Borrowing
resources occurs recursively from the ancestors of the current resource pool as long as
the Expandable Reservation option is selected. Leaving this option selected offers
more flexibility, but, at the same time provides less protection. A child resource pool
owner might reserve more resources than you anticipate.
The system does not allow you to violate preconfigured Reservation or Limit settings. Each time you
reconfigure a resource pool or power on a virtual machine, the system validates all parameters so all service-
level guarantees can still be met.
Expandable Reservations Example 1
This example shows you how a resource pool with expandable reservations works.
Assume an administrator manages pool P, and defines two child resource pools, S1 and S2, for two different
users (or groups).
The administrator knows that users want to power on virtual machines with reservations, but does not
know how much each user will need to reserve. Making the reservations for S1 and S2 expandable allows
the administrator to more flexibly share and inherit the common reservation for pool P.
Without expandable reservations, the administrator needs to explicitly allocate S1 and S2 a specific amount.
Such specific allocations can be inflexible, especially in deep resource pool hierarchies and can complicate
setting reservations in the resource pool hierarchy.
Expandable reservations cause a loss of strict isolation. S1 can start using all of P's reservation, so that no
memory or CPU is directly available to S2.
vSphere Resource Management
60 VMware, Inc.