NCA-6.10 Questions Bank

Non-migratable VMs in a Nutanix cluster typically include those with attached Volume Groups. This is because such VMs leverage direct-attached storage via iSCSI, which ties them to a specific host, preventing live migration to another host. Volume Groups provide block storage to applications, and the iSCSI protocol does not support live migration of such connections.

Here's a breakdown of the options:

A. VMs without NGT:Nutanix Guest Tools (NGT) are used for guest-level integration but do not affect VM migratability.

B. VMs marked as an Agent:This setting does not inherently make VMs non-migratable. It primarily affects roles and tasks within certain configurations.

C. Memory Overcommitted:While memory overcommitment can affect performance, it does not make VMs non-migratable. Nutanix AHV handles memory allocation dynamically.

D. VMs with attached Volume Groups:Correct answer, as the iSCSI connections used by Volume Groups are host-specific and cannot migrate seamlessly.

Replication Factor (RF) defines the number of copies of data stored in a Nutanix cluster. RF2 ensures two copies of data, and RF3 ensures three copies. This redundancy allows the system to maintain data integrity and recoverability even in the event of hardware failures.

A. It limits the scope of hardware failures during recovery operations:Incorrect, as RF focuses on data replication, not limiting failure scopes.

B. It ensures that multiple copies of data are available for recovery:Correct, as RF directly relates to data redundancy and recovery capabilities.

C. It accelerates data transfer to remote backup sites:Incorrect, as RF does not affect remote backup speed.

D. It reduces the need for offsite backup solutions:Incorrect, as RF works within the cluster, not as a replacement for offsite backups.

Shared storage for Windows Server Failover Clustering (WSFC) is a use case for NutanixVolumes. Nutanix Volumes provides block storage (via iSCSI) to external systems, such as WSFC nodes, allowing them to share storage for failover clustering. This configuration is essential for high availability in Windows environments.

Other options:

Files: Provides file-based storage (NFS/SMB), not suited for WSFC shared block storage.

FT1 and RF2: Refer to Fault Tolerance and Redundancy Factor, not storage solutions.

Deduplication is most effective withfull clone VMsbecause it reduces redundant data blocks stored on the cluster. Full clone VMs often contain identical OS and application files, making them ideal candidates for deduplication, which optimizes storage usage and improves efficiency.

Other options:

Server workloads: May benefit from deduplication but not as significantly as full clone VMs.

Linked Clone VMs: Already share base disk images, so deduplication offers limited benefits.

Cold data: Deduplication is less effective for data that isn’t accessed frequently.