Nutanix NCS-Core Practice Test - Questions Answers, Page 2

Ref: https://kb.vmware.com/s/article/1009465

Ref: https://kb.vmware.com/s/article/1009465

Increasing the number of vCPUs from 2 to 4 can indeed reduce login times by providing more processing power to handle the login requests. However, this action will have two main impacts on the cluster:

A .Increase CPU utilization%: By increasing the number of vCPUs, you are effectively increasing the demand for CPU resources. This will result in a higher percentage of the CPU being utilized.

B .Increase CPU ready%: CPU Ready is a measure of the amount of time a virtual machine is ready to run against the pCPU, but is waiting to be scheduled on the physical CPU. By increasing the number of vCPUs, you are increasing the number of virtual machines that are ready to run, which can increase the CPU Ready percentage.

Increasing the vCPU count does not directly affect memory utilization, so options C and D are not correct.

The conclusions above are based on general virtualization principles covered in resources like the Nutanix Bible (https://www.nutanixbible.com/) and the Nutanix University training materials for NCS-Core certification (https://university.nutanix.com/). These sources explain the impact of CPU allocation and utilization in detail, particularly in the context of cluster performance and virtual desktop infrastructure.

Additionally, practical insights into these dynamics are discussed in various video tutorials from the Nutanix official YouTube playlist for NCS-Core learning (https://www.youtube.com/playlist?list=PLAHgaS9IrJecs_AcQT3Y7vSsKT2mjz3Iu), which provide visual and step-by-step breakdowns of how CPU resources are managed in a Nutanix environment.

https://next.nutanix.com/move-application-migration-19/nutanix-xtract-validation-failed-user-must-belong-in-a-group-with-restore-files-and-directories-security-policy-31303

When VMs on the same node can communicate but fail to connect to other parts of the network following changes made to Top of Rack switches, the issue often stems from a VLAN configuration error on the switches. VMs on the same node communicating successfully indicates that the local switch configuration is intact, but inability to reach external network segments points to an incorrect VLAN setup on the broader network, likely introduced during the recent changes to the Top of Rack switches.

Reference: Nutanix Networking Guide, Troubleshooting Network Connectivity in Nutanix.

In a Nutanix cluster, I/O latency can be affected by several factors. Given the scenario where a 32-node hybrid cluster is experiencing I/O latency, one possible cause could be the Information Life Cycle Management (ILM) constantly moving data due to curator scans1.

In a Nutanix cluster, ILM is responsible for managing data placement across different storage tiers. It promotes frequently accessed data to higher-performance tiers (like SSDs) and demotes less frequently accessed data to lower-performance tiers (like HDDs)1. This process involves moving data around, which can cause I/O operations to take longer, leading to increased latency1.

If the working set size (WSS) exceeds the SSD tier capacity, ILM will have to constantly move data between the SSD and HDD tiers to accommodate new data. This constant data movement can lead to increased I/O latency1.

Therefore, if curator scans caused by ILM are constantly moving data, it could be the reason for the observed I/O latency in this scenario.

Disk I/O Latency on a Nutanix Cluster | Nutanix Community

Nutanix Volumes - Recommendations And Best Practices

Nutanix Support & Insights

Expand Cluster with Nodes with Higher NIC SPEED (25 GBPS) | Nutanix ...

[Scaling Up VM Storage Performance on AHV -- Volume Group ... - Nutanix]

[About support for Nutanix segmented iSCSI network | Managing AHV ...]

To ensure the new application is securely deployed without affecting existing applications, the administrator should create new categories for the VMs hosting the new application. This approach allows for targeted application of security policies without impacting other applications. After creating these new categories, the administrator should then create new security policies that incorporate these categories and specify the unique, non-standard ports used by the application, ensuring that security is tailored specifically to the new application's needs.

Reference: Nutanix Prism Central Guide, Nutanix Security Configuration Best Practices.