Study with 3V0-23.25 Actual Test Questions

An administrator is monitoring a vSAN ESA backed workload domain that is dedicated for running AI inferencing. When the administrator navigates to the Storage Performance dashboard in VMware Cloud Foundation Operations, the performance dashboard shows:
* High backend write latency ( > 8 ms)
* Low read latency ( < 1 ms)
* Normal network throughput
* Disk Group Health = Green
Based on the readings above, what would be the explanation?

• A. The workload's small-block writes are compressed inline, lowering backend throughput and increasing cache misses.
• B. A wrongly sized read cache tier is throttling the write buffer, thus forcing the reads to trespass to the capacity tier.
• C. A vSAN network congestion event on the vSAN TCP port 2233 is throttling mirror acknowledgements.
• D. This is caused due to transient commit-queue delays, since the workload is exhibiting random-writes saturating ESA's write buffer.

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A VMware Cloud Foundation (VCF) Management Domain is requested to be deployed with the following information:
. 6 blade style hosts with no local storage beyond the operating system.
. 4 25 Gb networking cards installed in each host.
. A 30 TB external array configured to support NVMe/TCP only.
. 2 dVS switches, one configured for storage isolation and one for all other traffic.
. Aria Operations is not currently deployed in the environment.
Place the general steps in sequence for converging VCF on to this configuration.

Explanation:
Deploy ESX 9.x
Configure to use NVMe storage
Deploy vCenter 9.x
Deploy the VCF Installer Appliance
Download binaries for the installation
Deploy VCF 9.x using existing components as building blocks
Add additional components
The sequence begins with deploying ESX 9.x on the blade hosts because the hosts are the physical foundation for the future management domain. Since there is no local storage beyond the operating system and the external array supports NVMe/TCP only, the hosts must then be configured to use NVMe storage before vCenter is deployed. This provides the required shared datastore for the vCenter deployment and for later VCF management component placement. After the NVMe storage is accessible, vCenter 9.x is deployed to manage the ESX hosts and form the existing vSphere building block. The convergence process then moves into the VCF workflow: deploy the VCF Installer Appliance, download the required binaries to the installer appliance, and deploy VCF 9.x by using the existing vCenter and ESX hosts as starting building blocks. Because Aria Operations is not currently deployed, VCF Installer deploys the required missing components during the converge process, and remaining additional components are added after the core platform deployment is complete. Reference topics: Converging Existing Virtual Infrastructure, VCF Installer, Existing Components as Building Blocks, NVMe Storage Preparation.

A VMware Cloud Foundation (VCF) environment runs mixed workloads (Online Transaction Processing (OLTP) + analytics), with the following vSAN configuration:
* 8 hosts (all-flash), ESA enabled.
* Each host: 2 x 3.2 TB NVMe devices.
* Compression is Enabled.
* Checksum is Enabled.
* Storage Policy: FTT=1 (RAID-5/6), Failures to Tolerate = 1 and Object Space Reservation = 0%.
During peak OLTP load, vSAN resync I/O and backend congestion increase latency despite having sufficient network bandwidth.
What is the direct action the administrator can perform to improve write performance while maintaining data protection compliance?

• A. Convert policy to RAID-1 (FTT=1) for latency-sensitive workloads while keeping compression enabled.
• B. Increase FTT to 2 with RAID-5/6 and disable compression.
• C. Increase object reservation to 100% to pre-allocate capacity and prevent log-structuring overhead.
• D. Disable checksums to reduce metadata writes on NVMe devices.

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An administrator has been tasked with recommending a principal storage type for a new cluster within an existing VMware Cloud Foundation (VCF) Workload Domain.
The following information has been provided:
* The customer has a 25GbE capable network.
* The customer has an existing 3rd party storage solution that supports connectivity by either FibreChannel and NFS
* The new cluster will consist of two host servers that will be recycled from a previous project.
* Each of the host servers have the following configuration:
o One 500GB Enterprise-grade SSD drive.
o Two 2-Port IOGbE network cards.
* There is no budget for additional hardware.
Which approach should the administrator recommend for the principal storage type?

• A. Fibre Channel
• B. Fibre Channel over Ethernet
• C. NFS v4.1
• D. NFS v3

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Select the storage capabilities supported for use with persistent volumes in the VMware Kubernetes Service (VKS) in VMware Cloud Foundation (VCF).
Drag and drop the five supported capabilities from the vSphere Storage Capabilities list on the left and place them into the Supported Storage Capabilities list on the right in any order. (Choose five.)

Explanation:
Full Clone from Volume Snapshot
4kn Support
Online Volume Expansion
Offline Volume Expansion
Static Persistent Volume
VMware Kubernetes Service persistent volumes use vSphere storage integrations such as CNS and pvCSI to provide Kubernetes storage services backed by vSphere datastores and storage policies. The supported persistent volume capabilities include Static Persistent Volume, which allows pre-existing storage to be consumed by Kubernetes workloads; Offline Volume Expansion and Online Volume Expansion, which allow persistent volumes to be resized depending on workload and filesystem state; Full Clone from Volume Snapshot, which enables a new volume to be created from an existing snapshot; and 4kn Support, which supports modern 4K native storage devices where the underlying stack supports them. Storage vMotion with attached Persistent Volumes is not supported because moving an attached Kubernetes persistent volume while it is in active use can break attachment and consistency assumptions. Storage DRS is also not a supported persistent volume capability in this VKS context. Flash Read Cache is not part of the supported VKS persistent-volume capability set. Reference topics: VMware Kubernetes Service Storage, CNS, pvCSI, Persistent Volume Capabilities, Volume Expansion, Volume Snapshot Clone.