Nutanix Certified Master - Multicloud Infrastructure v1.0
Question 1
A VM is exhibiting one or more of the following baseline values based on the past 30 days:
✑ CPU usage < 20%
✑ CPU ready time < 5%
Memory usage < 50% (moderately) or < 20% (severely)
✑ Memory swap rate = 0 Kbps
Which type of VM is being described?
- A. Constrained VM
- B. Inactive VM
- C. Bully VM
- D. Over-Provisioned VM
Answer : D
Question 2
An administrator needs to forecast infrastructure requirements for a new program and its associated applications. Prior to the projected start of the new program, all existing applications will be decommissioned.
How should the administrator perform this task?
- A. Check the Disregard Existing Workloads radio button in the Runway scenario.
- B. Check the Disregard Existing Nodes radio button in the Runway scenario.
- C. Add up the recovered workloads and manually remove from the Runway configuration.
- D. Power down the workloads during a maintenance window and run the Capacity Runway.
Answer : A
Question 3
An administrator is deploying several new application VMs to a Nutanix cluster. The application is very transactional with a 28/72 random, read/write ratio.
What should the administrator do?
- A. Add a minimum of four SSDs to each node to ensure all writes go to the SSDs.
- B. Add a minimum of four virtual disks to each VM, and aggregate them on guest OS level.
- C. Add one large SSD to each node and enable Flash Mode for the VMs.
- D. Add one large virtual disk to each VM and use it for all application data.
Answer : B
>Multiple vdisks should be attached (they can be unified with LVM for example) to get more performance from VMג€™s, as Nutanix OS limiting oplog size per vdisk
(to avoid ג€noisy neighborג€ problem).
Reference:
https://next.nutanix.com/server-virtualization-27/iops-latency-issue-1168
Question 4
An alert about RX errors on eth2 on a node is reported in the cluster. The administrator logs in to the CVM in question, checks the ping_* files in the data/logs/ syststats folder, and notices intermittent ping loss. The node in question has the following network configuration:
Which action should be used to troubleshoot without disrupting the VMs running on this node?
- A. Replace the cable from eth2 to the switch
- B. Remove eth3 from br0-up and monitor for new alerts
- C. Check the port on the switch side for any errors
- D. Enable balance-s1b on br0-up and monitor if a problem persists
Answer : C
Question 5
A three-node cluster has a Nutanix Files instance with three FSVMs.
What happens after a node failure?
- A. The affected FSVM will get live-migrated to another node.
- B. The affected FSVM will not be restarted on another node due to its agent VM setting.
- C. The affected FSVM will not be restarted on another node due to its VM-to-VM anti-affinity settings.
- D. The affected FSVM will be restarted on another node.
Answer : D
Reference:
https://portal.nutanix.com/page/documents/details?targetId=Files-v3_6:fil-files-high-availability-c.html
Question 6
Refer to the exhibits.
An administrator has reported that a new VM is not performing well.
After analyzing the information presented in the exhibits, which option shows the best conclusion regarding this workload?
- A. VM is CPU constrained since the hypervisor cannot provide the required resources.
- B. VM is CPU constrained because more CPU needs to be added to the VM.
- C. VM is Storage constrained, because the workload is waiting for storage access.
- D. VM is not CPU constrained, because the VM is not running, a multithreaded application.
Answer : C
Question 7
An administrator is performing a set of routine checks and notes that Prism Central is running with 4 vCPUs and 21 GB RAM. The organizations environment is based on two Nutanix clusters with 170 VMs plus a Legacy vSphere infrastructure. No manual changes have been done on Prism Central VM.
Which configuration justifies the current Prism Central configuration?
- A. Nutanix Move is running on Prism Central to import VMs from the Legacy Cluster.
- B. Prism Central was installed for Large Deployment environments.
- C. Prism Central is running on the legacy cluster and requires more RAM.
- D. Nutanix Leap and Nutanix Flow have been enabled on Prism Central
Answer : D
Question 8
A customer wants to run SAP HANA on a Nutanix cluster with the following characteristics:
✑ AHV nodes
✑ SAP HANA version 2
✑ Production database files
Which configuration should be recommended to the customer?
- A. Start with a cluster containing three or more nodes
- B. Enable only compression for the container that contains the Production database
- C. Do not enable compression, deduplication, or erasure coding on the storage container
- D. Plate the SAP HANA Database on the same socket as CVM
Answer : C
Do not configure storage-saving functionalities such as compression, deduplication, or erasure coding (EC-X) on a storage container that holds production database files. Because of the way the SAP HANA Persistence Engine stores data, these features deliver no benefits. Nutanix SAP Engineering has tested compression with SAP HANA workloads; the tests indicate no noticeable performance impact but also show no reduction in the space the SAP HANA workload consumes.
Reference:
https://www.nutanix.com/go/sap-hana-on-nutanix-bpg
Question 9
An administrator receives reports that VDI desktop performance in an 8-node Nutanix VDI environment is poor. Opening applications takes between 1 and 2 minutes. When investigating the issue, the following conditions are found:
✑ Cluster memory utilization: 80%
✑ Cluster SSD utilization: 70%
✑ Average VM CPU Wait Time: 11%
✑ CVM CPU utilization: 75%
Which action should be taken to improve VDI performance?
- A. Increase the amount of SSD storage in the cluster.
- B. Add memory to the nodes in the cluster.
- C. Add CPU resources to the cluster.
- D. Increase the number of vCPU cores allocated to the CVM.
Answer : C
Question 10
An administrator receives an alert in Prism indicating that interface eth2, on an AHV host is receiving many CRC errors. After togging into the problematic host, the following command is run to show the indicated output:
What is causing this issue?
- A. Incorrect link speeds on the switch
- B. The interface is incorrectly configured with Jumbo Frames
- C. A misconfigured bond
- D. A physical layer network problem
Answer : B
rx_crc_errors are caused either by faults is layer 1 (in the past, we have seen failed twinax cables and incorrect types of fibre being used), or issues with jumbo frames on the network. In an environment with 10 Gig switches that use cut-through forwarding (Cisco Nexus, Arista, Cisco devices using IOS default to Store and
Forward switching), any packets that come into the switch will get forwarded out the destination interface once the switch has read the destination MAC address. If that packet has an MTU over what is configured on the interface, it will cut off the packet at the designated MTU, causing the server to receive a malformed packet, which will throw a CRC error.
If you have a layer 1 issue, you will see rx_crc_errors, not on all but one or two nodes.
Question 11
An administrator needs to migrate workloads from a Nutanix cluster running VMware ESXi to Nutanix AHV. The migration process needs to be completed in multiple VM groups and support roll back in case any problems are found during user acceptance testing.
Which action should the administrator perform?
- A. Use Cross Hypervisor DR to replicate VMs from ESXi to AHV
- B. Use VMware Converter
- C. Use Nutanix one-click cluster conversion from ESXi to AHV
- D. Use storage live migration
Answer : C
Question 12
Refer to the exhibit.
After performing ESXi to AHV conversion on a cluster, the alerts shown in the exhibit display on Prism. What should the administrator do to resolve this issue efficiently?
- A. Remove the VMs. create a new Protection Domain, and add VMs to it.
- B. Remove VMs from the Protection Domain and add them back in.
- C. Delete the Protection Domain, create a new Protection Domain, and add the VMs to it.
- D. Create a new Protection Domain and add the VMs to rt.
Answer : B
Question 13
For several days, an administrator notices the following alerts:
✑ CVM NIC Speed Low Warning Alerts
✑ Warning Alerts of CVM NIC not performing at optimal speed
✑ CVM is disconnected from the network Critical Alert
✑ Network Visualization page shows excessive dropped packets on CVM/Host.
Which steps should be taken to determine which problem should be addressed first?
A.
✑ Access the Hardware Page to verify resources are available
✑ Analyze all CVM Speed Alerts in the Alerts/Events page
✑ Analyze output for the network and interface properties and connectivity issues
B.
✑ Verify Host/CVM connectivity on the Network Visualization page
✑ Use to verify the bridge and bond configuration
✑ Review alerts/events page for the CVM disconnected error
C.
✑ Review Alerts page for NIC speed alerts and alert timing
✑ Analyze the genesis.out log file for process failures
✑ Assess the NIC properties in the Network Visualization > Host Properties page
D.
✑ Restart networking services on the CVM
✑ Determine the current configuration of the affected CVM via output
✑ Access the Alerts/Events page for the CVM network connection failures
Answer : B
Question 14
An administrator needs to relocate an AHV cluster to a new datacenter during a maintenance window. The cluster will use the same IPs in the new datacenter.
Which two steps should be taken to prepare for this task? (Choose two.)
- A. Stop all Nutanix Files clusters
- B. Relocate the linked LDAP servers
- C. Shut down all user VMs in the cluster
- D. Reconfigure IPMI for the new datacenter
Answer : AC
Reference:
https://next.nutanix.com/installation-configuration-23/physical-relocation-of-nutanix-clusters-38403
Question 15
An administrator needs to evaluate if the existing configuration of Protection Domains meets the specified corporate recovery policy for SQL Data. The corporate policy requires that all SQL Servers be recoverable at the DR site within 30 minutes, and must result in a maximum of 60 minutes of data loss. SQL data must be required.
The protection domain is configured as follows:
✑ Application consistent snapshots are enabled
✑ The SQL server VMs are assigned to the Protection Domain as their own Consistency Group
✑ The Protection Domain schedule is configured as snapshots taken every 90 minutes from 7 am until 8 pm
What must be changed to meet the required policy?
- A. Revise the schedule to be 15 minutes
- B. Revise the schedule to be 60 minutes
- C. Revise the schedule to be 30 minutes
- D. Revise the schedule to be 45 minutes
Answer : B