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Nutanix NCM-MCI-6.10 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Analyze and Optimize Storage Performance | 20% | - Optimize storage configuration and settings - Troubleshoot storage performance bottlenecks - Understand storage internals and I/O patterns - Evaluate and resolve competing workload requirements |
| Topic 2: Monitoring, Automation and Operational Efficiency | 5% | - Operational process optimization - Monitoring and alerting configuration - Automation workflows and tools |
| Topic 3: Business Continuity and Disaster Recovery | 15% | - Failover and failback operations - BCDR testing and validation - Disaster recovery strategy implementation - Replication and recovery configuration |
| Topic 4: Virtualization and VM Performance Optimization | 15% | - AHV administration and workload management - Performance metrics analysis and tuning - High availability and migration management - VM resource adjustment and optimization |
| Topic 5: Advanced Platform Configuration and Troubleshooting | 25% | - Cluster management, expansion and maintenance - Integration with third-party systems - Security configuration and compliance - API and CLI-based operations - Prism Central and Prism Element configuration |
| Topic 6: Network Performance and Security | 20% | - Implement and analyze Flow security policies - Optimize physical and virtual network configurations - Network troubleshooting and optimization - Tune overlay networking and traffic flow |
Nutanix Certified Master - Multicloud Infrastructure (NCM-MCI) Sample Questions:
TASK 1
A newly created Windows VM "SQL02" is experiencing poor storage performance when compared to
"SQL01" running within the same cluster, on the same storage container.
The cluster is in a healthy state.
Create a new session named Monitor SQL02 with meaningful metrics. Right click on the session page and click Select All then paste this into Notepad and save it as Task 1.txt on the desktop.
Also, save the analysis as a report named MonitorSQL02 and send the report as a PDF on a daily basis to [email protected]. Reports should not be retained. If any new objects need to be created, use monitovm2 in the name.
Finally, correct the issue within "SQL02".
Notes:
* Do not power on the VMs.
* While you will be creating a session, you will need to examine the VM configurations to determine the issue.
* Do not delete the VM to resolve the issue, any other destructive change is acceptable.
Correct Answer:
See the Explanation below for detailed answer.
Explanation:
Here is the step-by-step solution to all three tasks, performed within the Nutanix Prism interface.
Task 1: Create Monitoring Session & Save Metrics
* From the Prism Central dashboard, navigate to Operations > Analysis.
* Click the + New Session button.
* Name the session Monitor SQL02.
* In the "Entities" search box, type SQL01 and select VM: SQL01.
* In the "Entities" search box, type SQL02 and select VM: SQL02.
* Click Add Charts > New Chart.
* Title: Storage IOPS
* Metric: Storage Controller IOPS
* Click Add.
* Click Add Charts > New Chart.
* Title: Storage Latency
* Metric: Storage Controller Latency
* Click Add.
* Click Add Charts > New Chart.
* Title: Storage Bandwidth
* Metric: Storage Controller Bandwidth
* Click Add.
* Click Save Session.
* With the "Monitor SQL02" session open, right-click anywhere on the page and click Select All.
* Right-click again and select Copy.
* Open Notepad, paste the content, and save the file to the desktop as Task 1.txt.
(The content pasted into Task 1.txt would be the session's chart configurations, showing metrics for SQL01 and SQL02.)
Task 2: Create and Schedule the Report
* While still in the "Monitor SQL02" analysis session, click the Save as Report button (it looks like a bookmark icon).
* Name the report MonitorSQL02 and click Save.
* Navigate to Operations > Reports.
* Find the MonitorSQL02 report in the list. Select its checkbox.
* Click the Actions dropdown and select Schedule.
* Configure the schedule with the following settings:
* Schedule Name: monitovm2_daily_report
* Recurrence: Daily
* Start Time: (Set to a time, e.g., 8:00 AM)
* Repeat every: 1 day(s)
* Retention Policy: Uncheck the "Retain a copy of the report" box. (This ensures reports are not retained).
* Email Report: Check this box.
* Format: PDF
* Recipients: [email protected]
* Click Save.
Task 3: Identify and Correct the Performance Issue
This task is performed without powering on the VMs, indicating a configuration error.
Investigation
* Navigate to VMs > Table view.
* Click on the SQL01 (the good VM) and select the Configuration tab.
* Expand the Disks section. Observe that the primary disk is attached to a SCSI bus (e.g., scsi.0). This is the high-performance standard.
* Return to the VM list and click on SQL02 (the problem VM).
* Expand the Disks section.
Root Cause
You discover that the primary disk for SQL02 is attached to an IDE bus. The IDE bus has significant performance limitations and is not suitable for a database server, causing the poor storage performance.
Correction
* With the SQL02 VM selected, click the Update button.
* In the "Update VM" dialog, scroll down to the Disks section.
* Find the disk attached to the IDE bus. Click the Edit (pencil) icon for that disk.
* Change the Bus Type dropdown from IDE to SCSI.
* The Device Index will automatically populate (e.g., scsi.0).
* Click Save in the "Update Disk" dialog.
* (Note: A "VirtIO SCSI Controller" will be automatically added to the VM configuration if one was not already present.)
* Click Save in the "Update VM" dialog.
The VM SQL02 is now configured to use the high-performance VirtIO-SCSI controller, which will resolve the storage performance discrepancy once the VM is powered on.
Task 6
An administrator needs to assess performance gains provided by AHV Turbo at the guest level.
To perform the test the administrator created a Windows 10 VM named Turbo with the following configuration.
1 vCPU
8 GB RAM
SATA Controller
40 GB vDisk
The stress test application is multi-threaded capable, but the performance is not as expected with AHV Turbo enabled. Configure the VM to better leverage AHV Turbo.
Note: Do not power on the VM. Configure or prepare the VM for configuration as best you can without powering it on.
Correct Answer:
To configure the VM to better leverage AHV Turbo, you can follow these steps:
Log in to Prism Element of cluster A using the credentials provided.
Go to VM > Table and select the VM named Turbo.
Click on Update and go to Hardware tab.
Increase the number of vCPUs to match the number of multiqueues that you want to enable. For example, if you want to enable 8 multiqueues, set the vCPUs to 8. This will improve the performance of multi-threaded workloads by allowing them to use multiple processors.
Change the SCSI Controller type from SATA to VirtIO. This will enable the use of VirtIO drivers, which are required for AHV Turbo.
Click Save to apply the changes.
Power off the VM if it is running and mount the Nutanix VirtIO ISO image as a CD-ROM device. You can download the ISO image from Nutanix Portal.
Power on the VM and install the latest Nutanix VirtIO drivers for Windows 10. You can follow the instructions from Nutanix Support Portal.
After installing the drivers, power off the VM and unmount the Nutanix VirtIO ISO image.
Power on the VM and log in to Windows 10.
Open a command prompt as administrator and run the following command to enable multiqueue for the VirtIO NIC:
ethtool -L eth0 combined 8
Replace eth0 with the name of your network interface and 8 with the number of multiqueues that you want to enable. You can use ipconfig /all to find out your network interface name.
Restart the VM for the changes to take effect.
You have now configured the VM to better leverage AHV Turbo. You can run your stress test application again and observe the performance gains.
https://portal.nutanix.com/page/documents/kbs/details?targetId=kA00e000000LKPdCAOchangev
CPUto 2/4 ?
Change SATA Controller to SCSI:
acli vm.get Turbo
Output Example:
Turbo {
config {
agent_vm: False
allow_live_migrate: True
boot {
boot_device_order: "kCdrom"
boot_device_order: "kDisk"
boot_device_order: "kNetwork"
uefi_boot: False
}
cpu_passthrough: False
disable_branding: False
disk_list {
addr {
bus: "ide"
index: 0
}
cdrom: True
device_uuid: "994b7840-dc7b-463e-a9bb-1950d7138671"
empty: True
}
disk_list {
addr {
bus: "sata"
index: 0
}
container_id: 4
container_uuid: "49b3e1a4-4201-4a3a-8abc-447c663a2a3e"
device_uuid: "622550e4-fb91-49dd-8fc7-9e90e89a7b0e"
naa_id: "naa.6506b8dcda1de6e9ce911de7d3a22111"
storage_vdisk_uuid: "7e98a626-4cb3-47df-a1e2-8627cf90eae6"
vmdisk_size: 10737418240
vmdisk_uuid: "17e0413b-9326-4572-942f-68101f2bc716"
}
flash_mode: False
hwclock_timezone: "UTC"
machine_type: "pc"
memory_mb: 2048
name: "Turbo"
nic_list {
connected: True
mac_addr: "50:6b:8d:b2:a5:e4"
network_name: "network"
network_type: "kNativeNetwork"
network_uuid: "86a0d7ca-acfd-48db-b15c-5d654ff39096"
type: "kNormalNic"
uuid: "b9e3e127-966c-43f3-b33c-13608154c8bf"
vlan_mode: "kAccess"
}
num_cores_per_vcpu: 2
num_threads_per_core: 1
num_vcpus: 2
num_vnuma_nodes: 0
vga_console: True
vm_type: "kGuestVM"
}
is_rf1_vm: False
logical_timestamp: 2
state: "Off"
uuid: "9670901f-8c5b-4586-a699-41f0c9ab26c3"
}
acli vm.disk_create Turbo clone_from_vmdisk=17e0413b-9326-4572-942f-68101f2bc716 bus=scsi remove the old disk acli vm.disk_delete 17e0413b-9326-4572-942f-68101f2bc716 disk_addr=sata.0
An administrator needs to configure a new write-intensive MS-SQL VM on Cluster 1.
VM specifications:
* vCPU: 12
* vRAM: 128GB
* Storage: 100 GB OS, 750 GB Data
Create the VM and any objects needed in the current environment to meet requirements, maximizing performance for the production environment. Include NEWSQL in the name of any new objects.
Production environment:
* 4 nodes
* Each node has two 8-core CPUs
* Each node has 1024 GB RAM
* Storage: 4 × 7.16 TB SSD Disks and 8 × 8 TB HDD disks
Make sure the VM is configured for maximum performance for the production environment.
Note: Network configuration is not required at this time. Do not power on the VM.
Correct Answer:
See the Explanation below for detailed answer.
Explanation:
Here is the step-by-step solution to create the high-performance SQL VM on Cluster 1.
This task requires two phases: first, creating a new all-flash storage container, and second, creating the VM with a specific vNUMA and disk controller configuration for maximum performance.
1. Access Cluster 1 Prism Element
* From the main Prism Central dashboard, navigate to Hardware > Clusters.
* Find Cluster 1 in the list and click its name. This will open the specific Prism Element login page for that cluster.
* Log in to Cluster 1's Prism Element interface.
2. Create the All-Flash Storage Container
To maximize performance for a "write-intensive" workload on a hybrid cluster, the data and log disks must be placed on an all-flash container.
* In the Cluster 1 PE interface, click the gear icon (Settings) in the top-right corner.
* From the left-hand menu, select Storage.
* Click the + Storage Container button.
* Fill in the basic details:
* Name: NEWSQL_Flash_Container
* Click Advanced Settings.
* Scroll down to the Storage Tier section.
* Select the SSD radio button. This pins all data in this container to the SSD tier, ensuring all-flash performance.
* Click Save.
3. Create and Configure the VM
Now, create the VM, applying vNUMA and multi-SCSI controller best practices.
* From the main PE dashboard, navigate to the VM view.
* Click the + Create VM button.
* Enter the compute details. This configuration is critical for vNUMA performance, as it tells the VM's guest OS about the underlying physical NUMA topology (2 CPUs with 8 cores each).
* Name: NEWSQL_VM
* vCPUs: 12
* Number of Sockets: 2
* Cores per vCPU: 6 (This creates a 2-socket, 6-core VM, totaling 12 vCPUs)
* Memory: 128 GB
* Scroll down to the Disks section and add the OS disk:
* Click + Add New Disk.
* Storage Container: Select the default (hybrid) container.
* Size: 100 GB
* Bus: SCSI
* Device Index: 0 (This will be scsi.0)
* Click Add.
* Add the Data disk (on its own controller for parallel processing):
* Click + Add New Disk.
* Storage Container: Select NEWSQL_Flash_Container.
* Size: 750 GB
* Bus: SCSI
* Device Index: 1 (This creates a new controller, scsi.1)
* Click Add.
* Add a Log disk (on its own controller, a best practice for "write-intensive" SQL):
* Click + Add New Disk.
* Storage Container: Select NEWSQL_Flash_Container.
* Size: 100 GB (A common size for a log disk)
* Bus: SCSI
* Device Index: 2 (This creates a third controller, scsi.2)
* Click Add.
* Review the configuration: You should now have three disks attached, each on a separate controller (scsi.
0, scsi.1, scsi.2). This provides the maximum I/O performance.
* Ensure the Power on VM after creation box is unchecked.
* Click Save.
Topic 1, Performance Based Questions Set 1
Environment
You have been provisioned a dedicated environment for your assessment which includes the following:
Initial Steps
* When you first log into Prism Central or Prism Element you may see the EULA screen. Accept the EULA with any name and then disable Pulse.
* To access Prism Element, the pass-through from Prism Central
(Infrastructure\Hardware\Clusters\cluster-x\Launch Prism Element) works better than directly using the external IP:9440.
Workstation
* Windows Server 2019
* All software/tools/etc to perform the required tasks
* Nutanix Documentation and whitepapers can be found in Desktop\Files\Documentation and Desktop\Files\Documentation 6.10
* Note that the Workstation is the system you are currently logged into
* Windows Server 2019
* All software/tools/etc to perform the required tasks
* Nutanix Documentation and whitepapers can be found in Desktop\Files\Documentation and Desktop\Files\Documentation 6.10
* Note that the Workstation is the system you are currently logged into Nutanix Cluster
* There are two clusters provided, connected to one Prism Central. The connection information for the relevant cluster will be displayed to the right of the question. Please make sure you are working on the correct cluster for each item. Please ignore any licensing violations.
Important Notes
* If the text is too small and hard to read, or you cannot see all of the GUI, you can increase/decrease the zoom of the browser with CTRL + and CTRL - (the plus and minus keys).
Prism Central Web Console
* admin / ykZUCJMER7V*
* nutanix / UJ2xE!DEXGY
Cluster 1
* CVM external IP: 34.53.118.63
* CVM DR IP: 172.30.0.6
* admin / 9Fw0B!3QH4X)
* nutanix / GNP*FE2504XWZ
* root / KR*6HY0z5E8
Cluster 2
* CVM external IP: 34.82.155.5
* CVM DR IP: 172.30.0.4
* admin / 5*K30fA76X
* nutanix / N*3F%1ME!Z7T9
Task 2
Part1
An administrator logs into Prism Element and sees an alert stating the following:
Cluster services down on Controller VM (35.197.75.196)
Correct this issue in the least disruptive manner.
Part2
In a separate request, the security team has noticed a newly created cluster is reporting.
CVM [35.197.75.196] is using the default password.
They have provided some new security requirements for cluster level security.
Security requirements:
Update the default password for the root user on the node to match the admin user password: Note: 192.168.x.
x is not available. To access a node use the Host IP (172.30.0.x) from a CVM or the supplied external IP address.
Update the default password for the nutanix user on the CVM to match the admin user password.
Resolve the alert that is being reported.
Output the cluster-wide configuration of the SCMA policy to Desktop\Files\output.txt before changes are made.
Enable the Advance intrusion Detection Environment (AIDE) to run on a weekly basis for the cluster.
Enable high-strength password policies for the cluster.
Ensure CVMs require SSH keys for login instead of passwords. (SSH keys are located in the Desktop\Files\SSH folder).
Ensure the clusters meets these requirements. Do not reboot any cluster components.
Correct Answer:
See the Explanation for step by step solution.
Explanation:
To correct the issue of cluster services down on Controller VM (35.197.75.196) in the least disruptive manner, you need to do the following steps:
Log in to Prism Element using the admin user credentials.
Go to the Alerts page and click on the alert to see more details.
You will see which cluster services are down on the Controller VM. For example, it could be cassandra, curator, stargate, etc.
To start the cluster services, you need to SSH to the Controller VM using the nutanix user credentials. You can use any SSH client such as PuTTY or Windows PowerShell to connect to the Controller VM. You will need the IP address and the password of the nutanix user, which you can find in Desktop\Files\SSH\nutanix.
txt.
Once you are logged in to the Controller VM, run the command:
cluster status | grep -v UP
This will show you which services are down on the Controller VM.
To start the cluster services, run the command:
cluster start
This will start all the cluster services on the Controller VM.
To verify that the cluster services are running, run the command:
cluster status | grep -v UP
This should show no output, indicating that all services are up.
To clear the alert, go back to Prism Element and click on Resolve in the Alerts page.
To meet the security requirements for cluster level security, you need to do the following steps:
To update the default password for the root user on the node to match the admin user password, you need to SSH to the node using the root user credentials. You can use any SSH client such as PuTTY or Windows PowerShell to connect to the node. You will need the IP address and the password of the root user, which you can find in Desktop\Files\SSH\root.txt.
Once you are logged in to the node, run the command:
passwd
This will prompt you to enter a new password for the root user. Enter the same password as the admin user, which you can find in Desktop\Files\SSH\admin.txt.
To update the default password for the nutanix user on the CVM to match the admin user password, you need to SSH to the CVM using the nutanix user credentials. You can use any SSH client such as PuTTY or Windows PowerShell to connect to the CVM. You will need the IP address and the password of the nutanix user, which you can find in Desktop\Files\SSH\nutanix.txt.
Once you are logged in to the CVM, run the command:
passwd
This will prompt you to enter a new password for the nutanix user. Enter the same password as the admin user, which you can find in Desktop\Files\SSH\admin.txt.
To resolve the alert that is being reported, go back to Prism Element and click on Resolve in the Alerts page.
To output the cluster-wide configuration of SCMA policy to Desktop\Files\output.txt before changes are made, you need to log in to Prism Element using the admin user credentials.
Go to Security > SCMA Policy and click on View Policy Details. This will show you the current settings of SCMA policy for each entity type.
Copy and paste these settings into a new text file named Desktop\Files\output.txt.
To enable AIDE (Advanced Intrusion Detection Environment) to run on a weekly basis for the cluster, you need to log in to Prism Element using the admin user credentials.
Go to Security > AIDE Configuration and click on Enable AIDE. This will enable AIDE to monitor file system changes on all CVMs and nodes in the cluster.
Select Weekly as the frequency of AIDE scans and click Save.
To enable high-strength password policies for the cluster, you need to log in to Prism Element using the admin user credentials.
Go to Security > Password Policy and click on Edit Policy. This will allow you to modify the password policy settings for each entity type.
For each entity type (Admin User, Console User, CVM User, and Host User), select High Strength as the password policy level and click Save.
To ensure CVMs require SSH keys for login instead of passwords, you need to log in to Prism Element using the admin user credentials.
Go to Security > Cluster Lockdown and click on Configure Lockdown. This will allow you to manage SSH access settings for the cluster.
Uncheck Enable Remote Login with Password. This will disable password-based SSH access to the cluster.
Click New Public Key and enter a name for the key and paste the public key value from Desktop\Files\SSH\id_rsa.pub. This will add a public key for key-based SSH access to the cluster.
Click Save and Apply Lockdown. This will apply the changes and ensure CVMs require SSH keys for login instead of passwords.
Part1
Enter CVM ssh and execute:
cluster status | grep -v UP
cluster start
If there are issues starting some services, check the following:
Check if the node is in maintenance mode by running the ncli host ls command on the CVM. Verify if the parameter Under Maintenance Mode is set to False for the node where the services are down. If the parameter Under Maintenance Mode is set to True, remove the node from maintenance mode by running the following command:
nutanix@cvm$ ncli host edit id=<host id> enable-maintenance-mode=false
You can determine the host ID by using ncli host ls.
See the troubleshooting topics related to failed cluster services in the Advanced Administration Guide available from the Nutanix Portal's Software Documentation page. (Use the filters to search for the guide for your AOS version). These topics have information about common and AOS-specific logs, such as Stargate, Cassandra, and other modules.
Check for any latest FATALs for the service that is down. The following command prints all the FATALs for a CVM. Run this command on all CVMs.
nutanix@cvm$ for i in `svmips`; do echo "CVM: $i"; ssh $i "ls -ltr /home/nutanix/data/logs/*.FATAL"; done NCC Health Check: cluster_services_down_check (nutanix.com) Part2 Vlad Drac2023-06-05T13:22:00.86I'll update this one with a smaller, if possible, command Update the default password for the root user on the node to match the admin user password echo -e "CHANGING ALL AHV HOST ROOT PASSWORDS.\nPlease input new password: "; read -rs password1; echo "Confirm new password: "; read -rs password2; if [ "$password1" == "$password2" ]; then for host in $(hostips); do echo Host $host; echo $password1 | ssh root@$host "passwd --stdin root"; done; else echo "The passwords do not match"; fi Update the default password for the nutanix user on the CVM sudo passwd nutanix Output the cluster-wide configuration of the SCMA policy ncli cluster get-hypervisor-security-config Output Example:
nutanix@NTNX-372a19a3-A-CVM:10.35.150.184:~$ ncli cluster get-hypervisor-security-config Enable Aide : false Enable Core : false Enable High Strength P... : false Enable Banner : false Schedule : DAILY Enable iTLB Multihit M... : false Enable the Advance intrusion Detection Environment (AIDE) to run on a weekly basis for the cluster.
ncli cluster edit-hypervisor-security-params enable-aide=true
ncli cluster edit-hypervisor-security-params schedule=weekly
Enable high-strength password policies for the cluster.
ncli cluster edit-hypervisor-security-params enable-high-strength-password=true Ensure CVMs require SSH keys for login instead of passwords
https://portal.nutanix.com/page/documents/kbs/details?targetId=kA0600000008gb3CAA
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