Pass the Nutanix Certified Professional (NCP) NCP-US Questions and answers with ExamsMirror

it seems that reapplying the Prism Central upgrade might resolve this issue. According to the Nutanix Unified Storage v6 documents at nutanix.com1, Objects is a service that runs on Prism Central and can be upgraded along with Prism Central using LCM2. However, sometimes the upgrade might fail due to network issues or other reasons3. In that case, you can try to reapply the Prism Central upgrade by following these steps4:

Log in to Prism Central as an administrator

Go to Settings > Upgrade Software

Click on Reapply Upgrade

Follow the instructions on the screen

The garbage collection process is performed by Curator, a service that runs on Nutanix clusters and is responsible for cleaning up unused data and reclaiming space12. Curator scans run periodically in the background and can be monitored from Prism2.

https://next.nutanix.com/how-it-works-22/ncc-health-check-garbage-egroups-39097

The mspcli_cluster_list command lists all the existing service domains for the cluster, which can help identify if there is an issue with the Object Store Domain entries. The mspcli_status command can be used to get detailed status information on the specified service domain specified by the  parameter.

Volume Groups (VGs) are collections of vDisks that can be attached to VMs1. vDisks are virtual disks that reside on Storage Containers2. Storage Containers are logical entities that provide storage services with different compression options3.

To use post-process compression for the file server and inline compression for the database components, you need to create two vDisks on different Storage Containers with different compression options. Then you need to attach those vDisks to different VGs.

https://next.nutanix.com/volumes-block-storage-171/configuration-for-volumes-vdisks-40537

The administrator should avoid allocating over half the RAM on a host to a FSVM because the FSVM would cross NUMA node boundaries (option A).

NUMA (Non-Uniform Memory Access) is a memory architecture that divides the system memory into multiple regions that are assigned to different processors or cores.

If a FSVM crosses NUMA node boundaries, it will have to access memory from different regions, which will result in higher latency and lower performance for file operations.

To avoid this issue, the administrator should ensure that the FSVM memory allocation is within a single NUMA node boundary.

When upgrading Files from version 3.8.1.3 to 4.1.0.2 for all dark sites, the File Server Module component needs to be upgraded alongside the core Files components. This is because the File Server Module is a core component of Files and is responsible for file-level data services, including access control, auditing, and file sharing.

If the File Server Module is not upgraded alongside the core Files components, it can result in compatibility issues and potentially cause the upgrade to fail.

Therefore, it is recommended to upgrade the File Server Module together with the core Files components when upgrading Files.

According to the Nutanix Unified Storage (NCP-US) v6 documentation, when a node fails in a 3-node cluster, the FSVM (File Server Virtual Machine) will automatically restart on one of the remaining nodes. The remaining nodes will handle the storage traffic without requiring any user intervention.

https://portal.nutanix.com/page/documents/solutions/details?targetId=NVD-2151-Unified-Storage:high-availability-at-the-nutanix-files-level.html

These rules ensure that VMs are distributed across different hosts in a cluster, so that if one host fails, the impact on the VMs and their data will be minimal1. Nutanix Files also supports DFS-N (Distributed File System - Namespaces), which allows multiple file servers hosting the same data to support a common folder and provide site affinity for users2.

To add additional volumes to a VM that is mapped to a VG, you need to add more vDisks to that VG1. vDisks are virtual disks that reside on Storage Containers2.

To maintain data protection for a VM that is assigned to a Protection Domain (PD), you need to add any new vDisks to the same Consistency Group (CG) as the existing ones3. A CG is a subset of entities in a PD that are snapshotted in a crash-consistent manner2.