Section 8 – Perform Basic Troubleshooting and Alarm Management
- Objective 8.5 – Perform Basic Troubleshooting for HA/DRS and VMotion
QUESTION 71
An administrator is checking a HA/DRS Cluster for Compliance. Which of the following occurs if a host profile is not attached to the cluster?
A.The compliance check uses the default Datacenter host profile
B.The compliance check asks for a valid host profile
C.The cluster is checked for specific HA, DRS and DPM cluster requirements
D.The compliance check generates an error
Answer: C
QUESTION 72
An administrator finds that a VMotion and Storage VMotion operations do not succeed on a virtual machine. The virtual machine has been configured with N-Port ID Virtualization. The virtual machine has two data RDMs, one using a RAID5 LUN and one using a RAID0+1 LUN. When created, the mapping file for the RAID5 LUN was created on the same datastore as the virtual machine, while the mapping file for the RAID0+1 LUN was placed in a datastore used for production data virtual disks.
Which of the following statements are true about this configuration (Choose Two)?
A.Storage VMotion cannot be used with NPIV
B.VMotion cannot be used unless both mapping files are placed on the same datastore
C.Storage VMotion cannot be used unless both mapping files are placed on the same datastore
D.VMotion cannot be used with NPIV
Answer: AB
QUESTION 73
In a fully automated DRS cluster, what can be done to ensure a particular VM does not migrate automatically to another host?
A.use the Affinity Wizard to specify Manual Automation mode
B.set the DRS VM rule to keep on this host
C.do nothing because the DRS cluster must be put in Partially Automated mode to allow this level of control
D.set the DRS VM options for the particular VM to Partially Automated mode
Answer: D
Explanation:
The screenshot below shows the DRS VM option for a particular VM can be set to Partially Automated mode
QUESTION 74
Which of the following can be configured or modified from the Resource Allocation tab of a DRS Cluster? (Choose Two.)
A.CPU reservation for any virtual machine in the cluster
B.Memory reservation for child resource pools
C.Fixed or Expandable Reservation Type for any virtual machine in the cluster
D.CPU reservation for child resource pools
Answer: AC
QUESTION 75
An application in a virtual machine has failed. The virtual machine can still be accessed. Under which condition will VMware HA restart the failed application?
A.VMware HA will never restart the application.
B.VMware HA will restart the application every time, as long as the cluster is not red.
C.VMware HA will restart the application every time, as long as the Restart Priority is not set to Disabled.
D.VMware HA will only restart the application if the VMware tools are running.
Answer: A
Explanation:
vSphere Availability Guide ESX 4.0 ESXi 4.0 vCenter Server 4.0, page 23.
VM Monitoring restarts individual virtual machines if their VMware Tools heartbeats are not received within a set time. VMware HA cannot restart a failed application on a guest, as it is only monitoring the virtual machine. Therefore A is correct.
QUESTION 76
For a cluster with two ESX hosts, one using Intel processors and other using AMD processors, which of the following statements is true? (Choose Two)
A.VMware DRS can load balance live VMs among hosts
B.VMotion can move live VMs from one host to another
C.Storage VMotion can move a virtual machine disk file from one storage device to another
D.VMware HA can failover VMS from one host to another in case of a host failure
Answer: CD
Explanation:
Storage VMotion can move a virtual machine disk file from one storage device to another
if using different CPU types, since this simply involves moving the storage location. [C above]
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. Since the
VM is restarted, the new host will not need to continue executing instructions previously running on the failed host; so there is no need for any CPU compatibility requirements to be met. [D above]
QUESTION 77
Which two conditions can cause a combined VMware DRS/HA cluster to change to a red status? (Choose Two.)
A.DRS is in the process of balancing resources among hosts in the cluster when an HA event occurs.
B.The current failover capacity is smaller than the configured capacity.
C.A DRS-only host has been added to an HA cluster.
D.All the primary hosts in the cluster are not responding.
Answer: BD
QUESTION 78
A virtual machine performance graph shows Memory Swap In to be at 95%. Users of the VM are complaining that performance is slow.
Which of the following actions can be done to increase performance of the VM? (Choose Two)
A.decrease the memory reservation of the VM
B.decrease the memory limit of the VM
C.increase the memory reservation of the VM
D.move the VM using VMotion to another server
Answer: CD
QUESTION 79
What is the meaning of a red DRS cluster?
A.At least one host in the cluster is attempting to go into Maintenance mode.
B.Yellow clusters will become red after 15 minutes if DRS is unable to dynamically balance the load.
C.Red clusters indicate virtual machines are using more resources than the fixed reservation allows.
D.Red clusters are the highest priority and will receive resource allocations first.
Answer: C
Explanation:
vSphere Resource Management Guide ESX 4.0 ESXi 4.0 vCenter Server 4.0, page 59.
A cluster enabled for DRS becomes invalid (red) when the tree is no longer internally consistent, that is, resource constraints are not observed.
The total amount of resources in the cluster does not affect whether the cluster is red. A cluster can be red, even if enough resources exist at the root level, if there is an inconsistency at a child level.
You can resolve a red DRS cluster problem either by powering off one or more virtual machines, moving virtual machines to parts of the tree that have sufficient resources, or editing the resource pool settings in the red part.
QUESTION 80
An ESX Server in DRS cluster is placed into Maintenance Mode. Which of the following conditions are true? (Choose Two)
A.If the DRS cluster is in fully automated mode, DRS will automatically VMotion Virtual Machines to other ESX Servers
B.If the DRS cluster is in fully automated mode, DRS will make a migration recommendation and then VMotion Virtual Machines to other ESX servers.
C.If the DRS cluster is in partially automated mode then the Virtual Center System Administrator must VMotion Virtual Machines to another ESX Server.
D.If the DRS cluster is in partially automated mode then the Virtual Machines that have a High Restart Priority will be moved to another ESX Server.
Answer: AC
Explanation:
When the cluster goes into maintenance mode, the virtual machines are moved to another ESX host by VMotion. Should the DRS cluster be configured for all manual operations, the migration via VMotion is approved within the Virtual Infrastructure Client, then VMotion proceeds with the moves.
