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Question 84

An architect is tasked with designing a new VMware software-defined data center (SDDC) using VMware vSAN. The architect uses a storage assessment tool to determine the storage requirements for the new vSAN cluster. The new SDDC is going to be deployed into the existing data center and must be connected to a shared core network switch.

The architect decides to use vSAN ReadyNodes with the following configuration:

✑ Two disk groups with:

- Write Intensive NVMe 800 GB drive for cache

- Four 3.84 TB Mixed Use NVMe for capacity

✑ Four 10 GbE ports

Which element represents a risk that should be included in this design?

    Correct Answer: A

    The number of 10 GbE capable ports in the vSAN ReadyNode can represent a risk. For VMware vSAN, especially in an all-flash configuration where high bandwidth and low latency are critical, having only four 10 GbE ports might be insufficient for handling peak loads and ensuring redundancy and performance. Additional network ports or higher bandwidth might be necessary to mitigate risk and ensure optimal performance and fault tolerance.

Discussion
nemisis95Option: C

C. The existing network is 10 GbE capable

guruto355

10G NIC is poor for vSAN network. is it right?

dikboy

Hybrid VSAN = 1 GB NIC All-Flash VSAN = 10 GB NIC

bulijojo

"B"(Byte)??Is it not "b"(bit)?

sidious_awsOption: C

I would vote for C, because it doesn't mention if the existing network is 10GbE ready. So the assumption and the risk to be included would be to ensure the existing network is 10GbE ready.

UzairQureshiOption: D

Must be D As per below link, Dedicated or shared 10 Gbps for all-flash configurations. In question, it is mentioned NVME is used for cache and mixed NVME is used for Data so 10 GB network will be more then enough as configuration is hybrid https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vsan-planning.doc/GUID-AFF133BC-F4B6-4753-815F-20D3D752D898.html

bpexamOption: C

I would opt for C

c11

Can C not be an 'assumption'?

zqd

Yes, but full flash vsan need 10gbe. So if it's assumption, it's also a risk.

cloud29Option: C

Why C is the correct answer ?

Raouleke

Because its a shared network so its a risk. Also because none of the other are valid

FR_WolfmanOption: C

Answer C is the correct one : Full-flash vSAN need 10 Gb network A >> A single port is sufficient to use vSAN. We need at least 2 to avoid SPOF. So having 4 ports is of course a risk at all. B >> There is no risk to use vSAN ReadyNodes. It is even better D >> No problem in using NVMe drives.

andr3Option: C

must be C, we assume its 10G network, nothing mentioned

mvojka1990Option: C

Sharing existing Core switches that handle other extra traffic on the datacenter, it might be a gap as the vSAN Confirguration is equipted with all NVMe for cache and capacity and the data throughput is around Gigabytes per second, existing network will be bottleneck on the total throughput of the swithces itlselves. C

UzairQureshiOption: D

Must be D As per below link, Dedicated or shared 10 Gbps for all-flash configurations. In question, it is mentioned NVME is used for cache and mixed NVME is used for Data so 10 GB network will be more then enough as configuration is hybrid https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vsan-planning.doc/GUID-AFF133BC-F4B6-4753-815F-20D3D752D898.html

bigbigguyOption: D

Should be D cache capacity ratio exceed 10%

Aolivera

Vsan all flash has no ratio it depends on workload https://blogs.vmware.com/virtualblocks/2018/08/23/extending-all-flash-vsan-cache-tier-sizing-requirement-for-different-endurance-level-flash-device/

HelpinghanditexamsOption: C

Correct Answer : C

MosabShOption: C

why the answer is C ? is it because it's not a fiber connection ?

mvojka1990

there is no FC on vSAN architecture