Section 7 – Establish Service Levels
- Objective 7.1 – Create and Configure VMware Clusters
QUESTION 1
Distributed Power Management (DPM) requires which technology to be available on the NIC?
A.NetBIOS
B.BMC
C.WOL
D.DNS
Answer: C
Explanation:
‘Once you turn on VMware DRS for your cluster you can enable the cluster for VMware DPM, which allows the power management of ESX hosts within the cluster. You must also ensure that Wake-on-LAN, IPMI, or iLO are functioning properly on your hosts.
Only then can VMware DPM automate the power on and power off of ESX hosts using one of those methods.’
QUESTION 2
What is the maximum amount of Hosts per vSphere HA Cluster?
A.16
B.8
C.64
D.32
Answer: D
Explanation:
Table Resource Pool Maximums Hosts per HA cluster 32
QUESTION 3
An Administrator is configuring a VMware HA Cluster for three hosts and their resident VMs. The HA cluster will be configured to support a single host failure and resource considerations must be enforced during a failover event. To accomplish this task?
A.There must be enough cluster resources based on memory and CPU reservations to account for any potential host failure
B.All potential remaining hosts during a failure event must be able to accommodate the sum total of all VM memory configurations
C.Each host in the cluster must be able to accommodate the VM with the largest configured available memory
D.Each host in the cluster must be able to accommodate the VM with the highest CPU limit value
Answer: A
Explanation:
vSphere Availability Guide ESX 4.0 ESXi 4.0 vCenter Server 4.0, Page 11.
VMware HA provides high availability for virtual machines by pooling them and the hosts they reside on into a cluster. Hosts in the cluster are monitored and in the event of a failure, the virtual machines on a failed host are restarted on alternate hosts. Therefore there should be sufficient capacity to support any single host failover, (A)
QUESTION 4
In configuring a VMware HA Cluster the System Administrator can configure Admission Control. There are two options: Prevent VMs from being powered on if they violate availability constraints, or Allow VMs to be powered on even if they violate availability constraints. If the System Administrator chooses the option Prevent VMs from being powered on if they violate availability constraints then which of the following apply in the event of an ESX Host failure (Choose Two)?
A.VMware HA enforces the failover capacity defined for the cluster
B.Only Virtual Machines with a high restart priority will be restarted on surviving ESX Hosts
C.Virtual Machines running on failed ESX Hosts will not be restarted on surviving ESX Hosts
D.VMware HA restarts Virtual Machines on surviving hosts with the most unreserved capacity
Answer: AD
Explanation:
vSphere Availability Guide ESX 4.0 ESXi 4.0 vCenter Server 4.0, page 12 and 13.
You can configure VMware HA to tolerate a specified number of host failures. With the Host Failures Cluster Tolerates admission control policy, VMware HA ensures that a specified number of hosts can fail and sufficient resources remain in the cluster to fail over all the virtual machines from those hosts.
In the event of a host failure, the virtual machines running on that host are failed over, that is, restarted on the alternate hosts with the most available unreserved capacity (CPU and memory.)
QUESTION 5
The maximum number of hosts in a VMware HA cluster is?
A.8
B.32
C.24
D.16
Answer: B
Explanation:
Configuration Maximums VMware® vSphere 4.0 and vSphere 4.0 Update 1, page 7.
Table 6. Resource Pool Maximums Item Maximum HA Cluster Hosts per HA cluster 32
QUESTION 6
Which of the following are requirements for a fully functional VMware HA cluster (Choose Two)?
A.sufficient capacity to support at least one host failover
B.access to shared storage from all hosts
C.compatible CPUs in each host
D.a minimum of 2 Service Console ports
Answer: AB
Explanation:
vSphere Availability Guide ESX 4.0 ESXi 4.0 vCenter Server 4.0, Page 11.
VMware HA provides high availability for virtual machines by pooling them and the hosts they reside on into a cluster. Hosts in the cluster are monitored and in the event of a failure, the virtual machines on a failed host are restarted on alternate hosts. Therefore there should be sufficient capacity to support at least one host failover, (A) vSphere Availability Guide ESX 4.0 ESXi 4.0 vCenter Server 4.0, Page 20.
All virtual machines and their configuration files must reside on shared storage. So that you can power on the virtual machines using different hosts in the cluster, the hosts must be configured to access that shared storage, (B).
QUESTION 7
An administrator has a mixture of Intel-based ESX Hosts in a DRS cluster where the CPUs are compatible in every way except that some support the NX/XD feature and some do not. What can you do to minimize the effect of these differences (Choose Two)?
A.Mask the NX/XD bit in the Processor section of the Configuration tab on the ESX Hosts
B.Mask the NX/XD bit on every virtual machine in the cluster
C.Enable Rapid Virtualization Indexing
D.Enable enhanced VMotion compatibility
Answer: BD
Explanation:
vSphere Basic System Administration vCenter Server 4.0 ESX 4.0 ESXi 4.0, page 153.
Select Advanced > CPUID Mask.
1. Specify whether you want to hide the host’s CPU NX flag from the guest operating system
Hiding the NX flag prevents the guest operating system from making use of this CPU feature, but enables the virtual machine to be moved to hosts that do not include the NX feature. When the NX flag is visible, the guest operating system can make use of the feature, but the virtual machine can be moved only to hosts with the NX capability.
Enhanced VMotion Compatibility (EVC) processor support
Enhanced VMotion Compatibility (EVC) simplifies VMotion compatibility issues across
CPU generations. EVC automatically configures server CPUs with Intel FlexMigration or AMD-V Extended Migration technologies to be compatible with older servers. After
EVC is enabled for a cluster in the VirtualCenter inventory, all hosts in that cluster are configured to present identical CPU features and ensure CPU compatibility for VMotion.
The features presented by each host are determined by selecting a predefined EVC baseline.
QUESTION 8
Which of the following migration techniques can be used to move virtual disk files to another datastore (Choose Two)?
A.Storage VMotion
B.VMotion
C.Migrating a Suspended Virtual Machine
D.VMware Data Recovery
Answer: AC
Explanation:
VMware Storage VMotion Non-Disruptive Live Migration for Virtual Machine Storage Disk Files intuitive interface for live migration of virtual machine disk files within and across storage arrays with no downtime or disruption in service Migrating VMs without VMware VMotion
In his blog, Mike DiPetrillo shows us another example of both the power of the VMware API and the ease of use we get with the VI Toolkit for Windows. His script will move a VM from one ESX host to another, without making use of VMware VMotion.
Mike’s script asks you to log into VirtualCenter, then prompts for a source and destination host, as well as a VM to move. After a few sanity checks the VM is suspended, moved and un-suspended. You can do this process manually through the VI Client or automatically with Mike’s script.
QUESTION 9
Which technology is required when running a cluster with DRS and VMware HA?
A.P2V Assistant
B.VCB
C.VMotion
D.Virtual SMP
Answer: C
Explanation:
Resource Management Guide : Creating a VMware Cluster : Cluster Prerequisites If you want to use DRS for load balancing, the hosts in your cluster must be part of a VMotion network.
QUESTION 10
An ESX Administrator is configuring a VMware High Availability Cluster for three hosts and their resident VMs. The HA cluster will be configured to support a single host failure and resource considerations must be enforced during a failover event. To accomplish this task:
A.All potential remaining hosts during a failure event must be able to accommodate the sum total of all VMs’ available memory configurations
B.Each host in the cluster must be able to accommodate the VM with the highest CPU limit value
C.There must be enough cluster resources based on memory and CPU reservations to account for any potential host failure
D.Each host in the cluster must be able to accommodate the VM with the largest configured available memory
Answer: C
Explanation:
vSphere Availability Guide ESX 4.0 ESXi 4.0 vCenter Server 4.0, Page 11.
VMware HA provides high availability for virtual machines by pooling them and the hosts they reside on into a cluster. Hosts in the cluster are monitored and in the event of a failure, the virtual machines on a failed host are restarted on alternate hosts. Therefore there should be sufficient capacity to support any single host failover, (A)
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