Home » VMware » VCP550D » What is the advantage of leaving the mission critical virtual machines in the root resource pool?
A DRS cluster has been created with the following specifications:
All mission critical virtual machines are in the root resource pool.
All other virtual machines are placed into two child pools based on medium or low priority.
The two child pools contain adequate resources needed by the medium and low priority virtual machines.
The two child pools are reserving 35% of the total available resources of the cluster.
What is the advantage of leaving the mission critical virtual machines in the root resource pool?
A. The root resource pool has immediate access to new physical resources added to the cluster.
B. Virtual machines placed in the root resource pool have a higher vMotion priority in DRS.
C. Transparent Memory Page Sharing in the root resource pool has a higher weight than in child pools.
D. Virtual machines placed in the root resource pool have higher default share values.
Correct Answer: A
Explanation/Reference:
Explanation:
A resource pool is a logical grouping of the resources (Memory, CPUs etc.) on an ESXi host or cluster. Resource pools can be grouped into hierarchies and used to hierarchically partition available CPU and memory resources.
Each standalone host and each DRS cluster has an (invisible) root resource pool that groups the resources of that host or cluster. The root resource pool does not appear because the resources of the host (or cluster) and the root resource pool are always the same.
Users can create child resource pools of the root resource pool or of any user-created child resource pool. Each child resource pool owns some of the parent’s resources and can, in turn, have a hierarchy of child resource pools to represent successively smaller units of computational capability.
All resources on the host or cluster are in the root resource pool. In this question, we have two child pools are reserving 35% of the (current) total available resources of the cluster. Any new resources added to the host or cluster will automatically be added to the root resource pool.
Incorrect Answers:
B: Virtual machines placed in the root resource pool do not have a higher vMotion priority in DRS. Therefore, this answer is incorrect.
C: Transparent Memory Page Sharing in the root resource pool does not have a higher weight than in child pools. Therefore, this answer is incorrect.
D: Virtual machines placed in the root resource pool do not have higher default share values. Therefore, this answer is incorrect.
References:
https://pubs.vmware.com/vsphere-55/index.jsp#com.vmware.vsphere.resmgmt.doc/GUID-60077B40-66FF-4625-934A-641703ED7601.html
