Which of the following are benefits of using resource pools (Choose three)?
A.
access control and delegation
B.
isolation within pools, sharing between pools
C.
separation of resources from hardware
D.
automatically apply reservations and limits to groups of virtual machines
Explanation:
Why Use Resource Pools?
Resource pools allow you to delegate control over resources of a host (or cluster), but the
benefits are especially evident when you use resource pools to compartmentalize all
resources in a cluster. You can create multiple resource pools as direct children of the
host or cluster and configure them, then delegate control over them to other individuals
or organizations. Using resource pools can result in the following benefits:
Flexible hierarchical organization – You can add, remove, or reorganize resource pools or
change resource allocations as needed.
Isolation between pools, sharing within pools – Top-level administrators can make a pool
of resources available to a department-level administrator. Allocation changes that are
internal to one departmental resource pool do not unfairly affect other unrelated resource
pools.
Access control and delegation – When a top-level administrator makes a resource pool
available to a department-level administrator, that administrator can then perform all
virtual machine creation and management within the boundaries of the resources to
which the resource pool is entitled by the current shares, reservation, and limit settings.
Delegation is usually done in conjunction with permissions settings, which are discussed
in the Introduction to Virtual Infrastructure.
Separation of resources from hardware – If you are using clusters enabled for DRS, the
resources of all hosts are always assigned to the cluster. That means administrators can
perform resource management independently of the actual hosts that contribute the
resources. If you replace three 2GB hosts with two 3GB hosts, you don’t need to make
changes to your resource allocations.
This separation allows administrators to think more about aggregate computing capacity
and less about individual hosts.
Management of sets of virtual machines running a multi-tier service – You don’t need to
set resources on each virtual machine. Instead, you can control the aggregate allocation
of resources to the set of virtual machines by changing settings on their enclosing
resource pool.
Based on the answer, “Management of sets of virtual machines running a multi-tier service – You don’t need to
set resources on each virtual machine. Instead, you can control the aggregate allocation
of resources to the set of virtual machines by changing settings on their enclosing
resource pool.”
It sounds like “D. automatically apply reservations and limits to groups of virtual machines” should also be correct assuming the “group of virtual machines” are the ones that belong to the resource pool.
The explanation does not mention to “group of virtual machines”???
The explanation mentions “SETs of virtual machines”, where as option D says “GROUPS of virtual machines”. In my opinion, as the question is phrased, D should still be correct. Unless I am missing some detail..
Answer D can be correct.
But the question just requires three choices. So we should choose A,B,C.
Not sure about the answers here… Very confusing.
The explanation states “Isolation between pools, sharing within pools”
Not “isolation within pools, sharing between pools”
D seems to be more appropriate than B here
However, this does not seem to be a correct answer either considering the following:
http://www.aiotestking.com/vmware/2012/02/what-are-two-benefits-of-using-resource-pools/