Exam 3V0-21.21 topic 1 question 24 discussion

Changing to D - vVOLs vVOLs accomplish each one of the requirements, but specially this one: "Virtual machine aware back up will be leveraged" Here references: Replication -> https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.storage.doc/GUID-6346A936-5084-4F38-ACB5-B5EC70AB8269.html https://dyertribe.co.uk/2020/05/04/vvol-replication-with-nimble/ https://support.purestorage.com/Solutions/VMware_Platform_Guide/User_Guides_for_VMware_Solutions/Virtual_Volumes_User_Guide/vVols_Deep_Dive%3A_Array_Based_Replication_with_vVols Aware backup -> https://documentation.commvault.com/commvault/v11/article?p=14307.htm https://www.nakivo.com/blog/application-aware-vm-backup/ "The impact on the storage layer should not impact the performance of the compute layer." VSAN will have an important impact of compute layer. "Operational management overhead should be minimized" >> FC Additional management overhead (e.g. switch zoning)

Answer D. To have different replication attributes at the application level (or VM level), the only options to do this are vSAN and vVols. As we need the storage layer to not impact the compute layer, we can eliminate answer B (vSAN).

Changing to D ✑ Asynchronous replication is required between two sites. Offloaded to the array ✑ The impact on the storage layer should not impact the performance of the compute layer. Array has dedicated compute power ✑ Each application tier will require different replication attributes. ✑ Virtual machine live migration across compute and storage must be supported. Supported in vvols ✑ Virtual machine aware back up will be leveraged. Selected solution must support vvols ✑ Operational management overhead should be minimized. vvols ✑ Operational automation should be supported. vvols

Array capability ✑ Asynchronous replication is required between two sites.
 ISCSi configuration can be part of host profile ✑ Operational management overhead should be minimized.
 Array capability ✑ Each application tier will require different replication attributes. 
Supported ✑ Virtual machine live migration across compute and storage must be supported.
Supported ✑ Virtual machine aware back up will be leveraged.
Host profiles, PoweCLI covers this ✑ Operational automation should be supported.

first thought was B or D, but the requirements include "Operational automation" Must be D: https://www.vmware.com/content/dam/digitalmarketing/vmware/en/pdf/products/virtualvolumes/vmw-vsphere-virtual-volumes-vvolvs-solution-overview.pdf

I think it's D. vVOL.

Correct Answer : A

It should be D, based on the following requirement - Each application tier will require different replication attributes. vVol provides this. Also vSAN would be ruled out, because the impact of performance on Storage layer should not have impact on Compute layer.

I read this: https://docs.vmware.com/en/vSphere-Replication/8.4/com.vmware.vsphere.replication-admin.doc/GUID-1FF815EB-80DC-401B-AD0E-0898255DE624.html and vSAN with vsphere replication has some limitations. I think to work with vsan is better think in a stretched cluster, but for this solution, i think A is better option.

I am in doubt between A and B "The impact on the storage layer should not impact the performance of the compute layer." Why vSAN is better than FC in this case? This is actually a reason why to take FC over vSAN. For example, anytime a host goes down for any reason such as maintenance mode, etc, we will loss compute performances on our vSAN cluster. "Operational management overhead should be minimized" >> FC Additional management overhead (e.g. switch zoning) - In this case, vSAN is clearly better. Both answers cover the rest of the requirements. So... why do I believe the answer is B? Because it is a VMware exam and in case of doubt the right answer will be a full VMware solution. And probably because vSphere replication is a better way to keep everything working and running from both sides and with a more reduced downtime. Don't know, what do you think?

I suppose B

I think A

It shall be B. A and C are ruled out. D can't be because vvol requires a certified storage array for replication. A, C ,D will have impact on compute performance due to some challenge on storage.

Not sure...

Shoul be B